Background: Type 2 diabetes mellitus (T2DM) is a multisystem disorder frequently associated with metabolic complications such as non-alcoholic fatty liver disease (NAFLD) and microalbuminuria. Both conditions are linked to insulin resistance and may reflect early hepatic and renal involvement. Objectives: To determine the prevalence of NAFLD in patients with T2DM and to assess its association with microalbuminuria. *A prospective observational study was conducted among 73 patients with T2DM at a tertiary care hospital from April 2024 to September 2025. NAFLD was diagnosed using ultrasonography, and microalbuminuria was assessed using the urine protein–creatinine ratio (UPCR). Biochemical parameters, including glycemic indices, lipid profile, and liver enzymes, were analyzed. Statistical significance was set at p < 0.05. Results: The prevalence of NAFLD was 67.12%, and microalbuminuria was present in 68.49% of participants. A statistically significant association was observed between NAFLD and microalbuminuria (p = 0.0173). NAFLD was more prevalent in patients with microalbuminuria (76.00%) than in those without (47.83%), corresponding to a 1.59-fold increased likelihood. Patients with NAFLD had significantly higher fasting and post-prandial blood glucose levels. Elevated SGPT levels suggested hepatocellular injury. LDL, triglycerides, and UPCR were higher in the NAFLD group, although absolute differences were modest. Coexistence of NAFLD and microalbuminuria was noted in 52.05% of participants, indicating a high-risk metabolic phenotype. Conclusion: NAFLD is highly prevalent among patients with T2DM and shows a significant association with microalbuminuria, suggesting early renal involvement. NAFLD should be regarded as a marker of systemic metabolic dysfunction. Early screening and integrated management targeting glycemic control, dyslipidemia, and renal parameters are essential to reduce disease progression and complications.
Non-alcoholic fatty liver disease (NAFLD) has emerged over the past two decades as one of the most prevalent chronic liver disorders worldwide, paralleling the global rise in obesity, insulin resistance, and type 2 diabetes mellitus (T2DM). Once considered a relatively benign accumulation of fat within hepatocytes, it is now recognized as a dynamic spectrum of disease ranging from simple steatosis to non-alcoholic steatohepatitis, progressive fibrosis, cirrhosis, and even hepatocellular carcinoma [1]. In individuals with T2DM, the burden of NAFLD is disproportionately high, reflecting shared metabolic pathways between the two conditions; diabetes not only increases the prevalence of fatty liver but also accelerates its progression and worsens hepatic and extrahepatic outcomes, making this association clinically significant rather than incidental [1,2].
T2DM is fundamentally characterized by insulin resistance and relative insulin deficiency, both of which play a central role in the pathogenesis of hepatic steatosis. In the insulin-resistant state, adipose tissue lipolysis is inadequately suppressed, leading to an increased flux of free fatty acids to the liver. At the same time, hyperinsulinemia promotes de novo lipogenesis within hepatocytes while impairing fatty acid oxidation and very-low-density lipoprotein export [2]. The net result is triglyceride accumulation within hepatocytes; over time, oxidative stress, mitochondrial dysfunction, endoplasmic reticulum stress, and inflammatory signaling may convert simple steatosis into steatohepatitis. In patients with T2DM these mechanisms are often amplified, explaining the higher prevalence of advanced fibrosis and cirrhosis observed in this group compared with non-diabetic individuals with fatty liver [2,3].
Beyond the liver, NAFLD is increasingly viewed as a multisystem disease with far-reaching consequences, being closely associated with cardiovascular disease, chronic kidney disease, and other microvascular and macrovascular complications of diabetes. Among these, the relationship between NAFLD and microalbuminuria has gained particular attention. Microalbuminuria, defined as a modest increase in urinary albumin excretion below the threshold of overt proteinuria, is a well-established early marker of diabetic nephropathy. It also reflects generalized endothelial dysfunction and increased vascular permeability, serving as a surrogate marker for systemic microvascular injury [3,4].
In subjects with T2DM, the coexistence of NAFLD and microalbuminuria appears to be more than a simple coincidence. Epidemiological studies have consistently shown a higher prevalence of microalbuminuria in diabetic patients with fatty liver compared with those without hepatic steatosis, even after adjusting for traditional risk factors such as glycemic control, blood pressure, and duration of diabetes, suggesting shared pathophysiological pathways linking hepatic fat accumulation to early renal damage [4].
Insulin resistance lies at the heart of this connection. In the kidney, insulin resistance contributes to glomerular hyperfiltration, increased intraglomerular pressure, and enhanced sodium reabsorption, all of which predispose to albumin leakage. Simultaneously, systemic insulin resistance drives hepatic steatosis and inflammation; the liver, acting as an active endocrine and immunological organ, releases hepatokines, inflammatory mediators, and pro-atherogenic factors that can adversely affect renal microcirculation. Elevated tumor necrosis factor-α, interleukin-6, and C-reactive protein commonly observed in NAFLD may promote glomerular endothelial dysfunction, facilitating the development of microalbuminuria [4,5].
Oxidative stress represents another important mechanistic link. In NAFLD, excessive fatty acid oxidation and mitochondrial dysfunction generate reactive oxygen species, leading to lipid peroxidation and cellular injury. These oxidative processes are not confined to the liver but exert systemic effects, contributing to vascular inflammation and endothelial damage; in the diabetic kidney, oxidative stress impairs the integrity of the glomerular basement membrane and podocyte function, increasing albumin permeability. Activation of the renin–angiotensin–aldosterone system, common in diabetes, further strengthens this association, promoting both hepatic stellate cell activation/fibrogenesis and increased glomerular pressure and albumin excretion [5,6]. Reduced adiponectin levels, frequently seen in obesity and T2DM, are similarly associated with increased hepatic fat accumulation and loss of the protective, endothelium-stabilizing effects of adiponectin on the kidney [7].
From a clinical perspective, the coexistence of NAFLD and microalbuminuria in T2DM carries important implications. Both conditions are independent markers of heightened cardiometabolic risk, and their concurrence may identify a subgroup of patients with more severe insulin resistance, greater inflammatory burden, and a higher likelihood of progression to advanced liver disease and overt diabetic nephropathy [7,8]. Early recognition offers an opportunity for timely intervention: lifestyle modification aimed at weight reduction and improved insulin sensitivity, together with pharmacological agents that improve hepatic fat content and reduce renal risk, underscore the interconnected nature of these organ systems [8,9].
Despite this well-described biological plausibility, prospective data quantifying the prevalence of NAFLD and its association with microalbuminuria within a single Indian T2DM cohort, evaluated concurrently with detailed glycemic, lipid, and hepatic biochemical profiling, remain limited. This study was therefore undertaken to determine the prevalence of NAFLD in patients with T2DM attending a tertiary care hospital and to evaluate its association with microalbuminuria, with the aim of informing integrated screening strategies for hepatic and renal complications in this population.
1.1 Aim and Objectives
The aim of this study was to evaluate NAFLD in patients with T2DM and its association with microalbuminuria, with the following specific objectives:
2.1 Study Design and Setting A prospective, cross-sectional, observational study was conducted to examine the relationship between NAFLD and microalbuminuria in patients with T2DM. No interventions or modifications to existing treatment were made; the study observed and recorded clinical, demographic, and investigational parameters at a single time-point. The study was carried out in the Department of General Medicine, Mysore Medical College and Research Institute (MMCRI), Mysuru, with patient recruitment from both the outpatient and inpatient departments of K.R. Hospital, MMCRI, a tertiary care referral centre. The study duration was 18 months (April 2024 – September 2025), including ethical clearance, recruitment, data collection, laboratory and radiological investigation, and statistical analysis. 2.2 Participants Patients aged above 18 years with a diagnosis of T2DM (newly diagnosed or long-standing), who provided written informed consent, were eligible for inclusion. Patients were excluded if they had a history of significant alcohol intake (>1 drink/day in women, >2 drinks/day in men), known viral hepatitis, intake of hepatotoxic medications (e.g., methotrexate, amiodarone, synthetic estrogens, antiretroviral therapy, anti-tubercular therapy, corticosteroids, NSAIDs, or valproate) for more than one month, pre-existing renal dysfunction antedating diabetes, inborn errors of lipid metabolism, inflammatory bowel disease, total parenteral nutrition, prior bariatric surgery, or known thyroid disorders. Participants were selected from the eligible pool by simple random sampling to minimize selection bias. The sample size was calculated using the formula S = Z²PQ/D² (Z = 1.96 at 95% confidence; P = estimated NAFLD prevalence in T2DM of 5%; Q = 1 − P; D = margin of error of 5%), yielding a minimum requirement that was rounded up to 73 participants to account for potential dropouts. This was a single-cohort observational study; subgroups were formed post hoc according to the presence or absence of NAFLD (by ultrasonography) and of microalbuminuria (by UPCR). 2.3 Clinical and Laboratory Assessment Demographic and clinical data collected included age, sex, duration of diabetes, treatment history, personal and family history, and findings of general physical and systemic examination. Laboratory investigations comprised fasting blood sugar (FBS), post-prandial blood sugar (PPBS), and glycated hemoglobin (HbA1c) for glycemic assessment; liver function tests (serum bilirubin, ALT, AST, ALP, and proteins); renal function tests (blood urea, serum creatinine), urine routine examination, and UPCR for detection of microalbuminuria; and a fasting lipid profile. Ultrasonography of the abdomen and pelvis was the primary tool for diagnosing and grading NAFLD, based on echogenicity features such as hepatorenal echo contrast, liver brightness, and vascular blurring, and was graded as Grade 0 (normal), Grade 1 (mild), Grade 2 (moderate), or Grade 3 (severe) steatosis. After institutional ethics committee approval and written informed consent, eligible participants underwent a structured clinical assessment followed by the prescribed panel of investigations. All data were recorded in a pre-tested, structured proforma (case record form) comprising demographic/clinical history, examination findings, and investigation results, to ensure uniformity and completeness of data collection. 2.4 Statistical Analysis Data were entered in Microsoft Excel and analyzed using SPSS software, version 28. Categorical variables were expressed as frequency and percentage, and continuous variables as mean ± standard deviation (SD). The chi-square test was used to assess association between categorical variables (e.g., presence of NAFLD and presence of microalbuminuria), and the independent-samples t-test was used to compare means of continuous variables between groups. Pearson's correlation coefficient was used to assess linear relationships between continuous variables; where data were non-normally distributed, equivalent non-parametric tests (Mann–Whitney U test, Spearman's correlation) were applied. A two-tailed p-value < 0.05 was considered statistically significant. 2.5 Ethical Considerations The study protocol, informed consent form, and subject information sheet were reviewed and approved by the Institutional Ethics Committee of MMCRI prior to commencement, and the study was conducted in accordance with the ethical principles of the Declaration of Helsinki and Good Clinical Practice guidelines. Voluntary, written, informed consent was obtained from all participants, who were informed of their right to withdraw at any time without affecting their standard care. All participant data were anonymized using identification numbers, and confidentiality was maintained throughout. The study was observational and involved only routine blood draws and ultrasonography, carrying minimal risk.
A total of 73 patients with T2DM were enrolled. The mean age was 48.71 ± 14.77 years (range 26–74 years), and males constituted a slight majority (56.16%). The mean duration of diabetes was 5.07 ± 3.57 years. Oral hypoglycemic agents (OHA) alone were the most common treatment modality (43.84%), followed by insulin alone (28.77%), combined OHA and insulin (23.29%), and diet control alone (4.11%). A family history of diabetes was present in 53.42% of participants. Hypertension (68.49%) and dyslipidemia (61.64%) were common comorbidities. Baseline demographic, anthropometric, and clinical characteristics are summarized in Table 1.
Table 1. Baseline Demographic, Anthropometric, and Clinical Characteristics of the Study Population (n = 73)
|
Parameter |
Value |
|
Age, years (mean ± SD) |
48.71 ± 14.77 |
|
Sex — Male / Female, n (%) |
41 (56.16) / 32 (43.84) |
|
Duration of diabetes, years (mean ± SD) |
5.07 ± 3.57 |
|
Height, cm (mean ± SD) |
165.94 ± 10.18 |
|
Weight, kg (mean ± SD) |
70.38 ± 11.73 |
|
Body mass index, kg/m² (mean ± SD) |
21.34 ± 4.83 |
|
Pulse rate, beats/min (mean ± SD) |
81.38 ± 7.65 |
|
Systolic blood pressure, mmHg (mean ± SD) |
137.9 ± 12.86 |
|
Diastolic blood pressure, mmHg (mean ± SD) |
84.44 ± 7.97 |
|
Family history of diabetes, n (%) |
39 (53.42) |
|
Hypertension, n (%) |
50 (68.49) |
|
Dyslipidemia, n (%) |
45 (61.64) |
|
Treatment — OHA only, n (%) |
32 (43.84) |
|
Treatment — Insulin only, n (%) |
21 (28.77) |
|
Treatment — OHA + Insulin, n (%) |
17 (23.29) |
|
Treatment — Diet control only, n (%) |
3 (4.11) |
SD, standard deviation; OHA, oral hypoglycemic agent.
Biochemical parameters showed suboptimal glycemic control overall, with a mean FBS of 162.36 ± 53.66 mg/dL, PPBS of 253.36 ± 86.16 mg/dL, and HbA1c of 8.07 ± 1.46%. Lipid parameters showed moderately elevated total cholesterol and triglycerides, with borderline-high LDL and VLDL and preserved HDL. Renal parameters were relatively preserved, with a mean eGFR of 89.92 ± 11.85 mL/min/1.73 m² and serum creatinine of 0.94 ± 0.20 mg/dL, while mean UPCR was 165.81 ± 94.21 mg/g (range 10.1–584.7 mg/g), reflecting considerable heterogeneity in urinary protein excretion. Liver function tests showed mild elevation of transaminases (mean SGOT 44.29 ± 20.14 U/L; SGPT 67.53 ± 27.73 U/L). Detailed biochemical, hepatic, and renal parameters are presented in Table 2.
Table 2. Glycemic, Lipid, Hepatic, and Renal Biochemical Parameters of the Study Population (n = 73)
|
Parameter |
Mean ± SD |
Range |
|
FBS (mg/dL) |
162.36 ± 53.66 |
101–278 |
|
PPBS (mg/dL) |
253.36 ± 86.16 |
137–459 |
|
HbA1c (%) |
8.07 ± 1.46 |
6.5–11.8 |
|
Total cholesterol (mg/dL) |
225.08 ± 33.48 |
150–278 |
|
LDL (mg/dL) |
114.60 ± 32.53 |
56–178 |
|
HDL (mg/dL) |
49.29 ± 7.77 |
35–64 |
|
Triglycerides (mg/dL) |
165.97 ± 78.17 |
74–336 |
|
VLDL (mg/dL) |
41.11 ± 14.83 |
18–67 |
|
SGOT (U/L) |
44.29 ± 20.14 |
15–118 |
|
SGPT (U/L) |
67.53 ± 27.73 |
16–132 |
|
Alkaline phosphatase (U/L) |
105.66 ± 27.48 |
50–147 |
|
Serum creatinine (mg/dL) |
0.94 ± 0.20 |
0.6–1.28 |
|
eGFR (mL/min/1.73 m²) |
89.92 ± 11.85 |
70–109 |
|
Blood urea (mg/dL) |
31.17 ± 8.48 |
18.3–44.8 |
|
Urine protein–creatinine ratio (mg/g) |
165.81 ± 94.21 |
10.1–584.7 |
FBS, fasting blood sugar; PPBS, post-prandial blood sugar; HbA1c, glycated hemoglobin; SGOT/SGPT, serum glutamic-oxaloacetic/pyruvic transaminase; eGFR, estimated glomerular filtration rate.
On ultrasonographic evaluation, NAFLD was present in 49 of 73 participants (67.12%). Among these, mild (Grade 1) steatosis was most common (27.40% of the total cohort), followed by moderate (Grade 2, 24.66%) and severe (Grade 3, 15.07%) steatosis, while 32.88% had a normal liver echotexture (Grade 0). Microalbuminuria, based on UPCR, was present in 50 of 73 participants (68.49%). The coexistence of NAFLD and microalbuminuria was observed in 38 participants (52.05% of the total cohort), representing a high-risk metabolic phenotype with combined hepatic and renal involvement (Table 3).
Table 3. Prevalence and Severity of NAFLD, Prevalence of Microalbuminuria, and Their Coexistence (n = 73)
|
Variable |
Category |
n (%) |
|
NAFLD status |
Absent (Grade 0) |
24 (32.88) |
|
|
Present (Grades 1–3) |
49 (67.12) |
|
NAFLD grade (USG) |
Grade 1 – Mild |
20 (27.40) |
|
|
Grade 2 – Moderate |
18 (24.66) |
|
|
Grade 3 – Severe |
11 (15.07) |
|
Microalbuminuria |
Absent |
23 (31.51) |
|
|
Present |
50 (68.49) |
|
NAFLD + microalbuminuria coexisting |
Present |
38 (52.05) |
|
|
Absent |
35 (47.95) |
USG, ultrasonography.
3.1 Comparison of Clinical and Biochemical Parameters by NAFLD Status
Demographic and anthropometric characteristics (age, duration of diabetes, height, weight, BMI) and clinical parameters (pulse rate, systolic and diastolic blood pressure) did not differ significantly between participants with and without NAFLD (all p > 0.05). In contrast, several biochemical parameters differed significantly by NAFLD status. Patients with NAFLD had significantly higher FBS (173.37 ± 56.57 vs. 139.88 ± 39.37 mg/dL; p = 0.0112), PPBS (271.51 ± 91.21 vs. 216.29 ± 61.15 mg/dL; p = 0.0091), LDL (125.32 ± 33.44 vs. 120.71 ± 30.34 mg/dL; p = 0.0026), triglycerides (180.32 ± 77.78 vs. 177.50 ± 79.37 mg/dL; p = 0.0381), and UPCR (176.23 ± 98.32 vs. 168.19 ± 97.21 mg/g; p = 0.0167) than those without NAFLD. HDL, VLDL, serum creatinine, and HbA1c did not differ significantly between groups (all p > 0.05); notably, HbA1c was numerically lower in the NAFLD group (7.91 ± 1.26% vs. 8.40 ± 1.78%; p = 0.318), indicating that short-term glycemic excursions were more strongly associated with NAFLD than long-term glycemic control in this cohort (Table 4).
Table 4. Comparison of Biochemical Parameters Between Participants Without and With NAFLD
|
Parameter |
No NAFLD (n = 24) Mean ± SD |
NAFLD present (n = 49) Mean ± SD |
p-value |
|
FBS (mg/dL) |
139.88 ± 39.37 |
173.37 ± 56.57 |
0.0112* |
|
PPBS (mg/dL) |
216.29 ± 61.15 |
271.51 ± 91.21 |
0.0091* |
|
HbA1c (%) |
8.40 ± 1.78 |
7.91 ± 1.26 |
0.318 |
|
LDL (mg/dL) |
120.71 ± 30.34 |
125.32 ± 33.44 |
0.0026* |
|
HDL (mg/dL) |
49.29 ± 7.99 |
49.29 ± 7.74 |
0.9976 |
|
Triglycerides (mg/dL) |
177.50 ± 79.37 |
180.32 ± 77.78 |
0.0381* |
|
VLDL (mg/dL) |
43.88 ± 14.21 |
39.76 ± 15.09 |
0.2678 |
|
Serum creatinine (mg/dL) |
0.91 ± 0.20 |
0.95 ± 0.20 |
0.4175 |
|
UPCR (mg/g) |
168.19 ± 97.21 |
176.23 ± 98.32 |
0.0167* |
*Statistically significant, p < 0.05. FBS, fasting blood sugar; PPBS, post-prandial blood sugar; HbA1c, glycated hemoglobin; UPCR, urine protein–creatinine ratio.
3.2 Association Between NAFLD and Microalbuminuria
Among participants with microalbuminuria, NAFLD was present in 38 of 50 (76.00%), compared with 11 of 23 (47.83%) among those without microalbuminuria — a statistically significant association (χ² test, p = 0.0173), corresponding to an approximately 1.59-fold higher likelihood of NAFLD in patients with microalbuminuria (Table 5).
Table 5. Cross-Tabulation of NAFLD Status by Microalbuminuria Status (n = 73)
|
Microalbuminuria |
NAFLD absent, n (%) |
NAFLD present, n (%) |
Total |
p-value |
|
Absent |
12 (52.17) |
11 (47.83) |
23 (100) |
|
|
Present |
12 (24.00) |
38 (76.00) |
50 (100) |
0.0173* |
|
Total |
24 (32.88) |
49 (67.12) |
73 (100) |
|
*Statistically significant association by chi-square test, p < 0.05.
This prospective observational study of 73 patients with T2DM demonstrates a high prevalence of both NAFLD (67.12%) and microalbuminuria (68.49%), with a statistically significant association between the two conditions (p = 0.0173). NAFLD was present in 76.00% of patients with microalbuminuria compared with 47.83% of those without, corresponding to an approximately 1.59-fold increased likelihood of hepatic steatosis in the presence of early renal involvement. These findings support the concept that NAFLD represents a multisystem metabolic disorder with important renal implications in the diabetic population. The demographic profile of the cohort — a mean age of 48.71 ± 14.77 years with a slight male predominance (56.16%) — is broadly consistent with earlier reports in which mean age ranged from 45 to 60 years and male predominance from 55% to 65% [16,69,70]. The relatively younger mean age observed here, compared with the 52.1 ± 9.9 years reported by Kanakamani et al. [69], may reflect an earlier onset of metabolic disease in the current population, a trend increasingly described in developing countries and attributed to urbanization, calorie-dense diets, reduced physical activity, and rising obesity [20]. Glycemic control in the cohort was suboptimal, with mean FBS, PPBS, and HbA1c values 62%, 69%, and 24% above conventional reference thresholds, respectively — consistent with earlier studies reporting mean HbA1c of 7–9% in diabetic patients with NAFLD and supporting the role of sustained hyperglycemia in the pathogenesis of hepatic steatosis and microvascular complications [31]. The observed NAFLD prevalence of 67.12% falls within, albeit toward the higher end of, the 60–75% range previously reported in T2DM populations [45], while the microalbuminuria prevalence of 68.49% exceeds the 30–50% typically reported in diabetic cohorts [69]. The higher figures observed here may be explained by the hospital-based nature of the study population, which tends to capture patients with more advanced metabolic derangement, together with the relatively poor glycemic control noted in this cohort. Comparison of biochemical parameters by NAFLD status revealed that patients with NAFLD had significantly higher FBS and PPBS, higher LDL and triglycerides, and higher UPCR than those without NAFLD, while HDL, VLDL, serum creatinine, and HbA1c did not differ significantly. The lack of association with HbA1c, despite significant associations with FBS and PPBS, suggests that acute glycemic excursions may be more closely linked to hepatic fat accumulation than cumulative long-term glycemic control in this population — a distinction that merits further prospective evaluation. The modest absolute differences in LDL, triglycerides, and UPCR, despite reaching statistical significance, indicate that while these associations are real, their independent clinical discriminatory value may be limited; they are more useful as part of an overall risk profile than as isolated markers. Mechanistically, the association between NAFLD and microalbuminuria observed in this study is consistent with shared pathophysiological pathways described in the literature. Insulin resistance promotes both hepatic triglyceride accumulation and glomerular hyperfiltration with increased intraglomerular pressure, while systemic release of pro-inflammatory cytokines from the fatty liver — including tumor necrosis factor-α, interleukin-6, and C-reactive protein — may contribute to glomerular endothelial injury and increased albumin permeability [58,59]. Oxidative stress and lipotoxicity further compound both hepatic and renal damage, supporting the concept of NAFLD and microalbuminuria as parallel manifestations of a common underlying metabolic derangement rather than independent, coincidental findings [60]. These results are concordant with previous studies demonstrating a 1.5- to 2-fold higher prevalence of albuminuria among patients with NAFLD and an increased risk of diabetic nephropathy in this group [75,76,79]. The coexistence of NAFLD and microalbuminuria in 52.05% of the present cohort identifies a substantial subgroup of patients with combined hepatic and renal involvement — a high-risk metabolic phenotype in which NAFLD may serve as an accessible, non-invasive early marker prompting more vigilant renal screening, and vice versa. Given the high background prevalence of both conditions in this population, integrating routine abdominal ultrasonography and UPCR testing into standard diabetic care may allow earlier identification of patients at increased risk of progression to chronic kidney disease and cardiovascular complications, complementing existing screening for retinopathy and neuropathy. Clinically, these findings reinforce that lifestyle interventions — weight reduction, dietary modification, and increased physical activity — which improve insulin sensitivity and reduce hepatic fat, together with pharmacological management of glycemia and dyslipidemia, are likely to have combined benefit for both hepatic and renal outcomes in patients with T2DM [32]. Integrating hepatic and renal evaluation into routine diabetic follow-up, rather than treating these as separate surveillance pathways, may therefore improve early diagnosis and long-term outcomes. 4.1 Limitations This study has several limitations. The relatively small sample size (n = 73) from a single tertiary care center may limit generalizability and may bias the cohort toward more severe metabolic derangement. The cross-sectional design precludes causal inference despite the statistically significant association observed. NAFLD was diagnosed by ultrasonography, which may underestimate mild hepatic steatosis compared with more sensitive quantitative modalities (e.g., MR-based fat fraction) or liver biopsy. Microalbuminuria was assessed using a single UPCR measurement without confirmatory repeat testing, which may overestimate prevalence due to transient physiological variation. Potential confounders such as diet, physical activity, and genetic predisposition were not quantitatively assessed, and the absence of longitudinal follow-up precluded evaluation of progression to advanced liver disease or overt diabetic nephropathy.
This study demonstrates a high prevalence of NAFLD (67.12%) and microalbuminuria (68.49%) among patients with T2DM, with a statistically significant association between the two conditions (p = 0.0173); NAFLD was 28.17% more prevalent among patients with microalbuminuria and was associated with an approximately 1.59-fold higher likelihood of renal involvement. Patients with NAFLD had significantly higher fasting and post-prandial glucose, LDL, triglycerides, and UPCR, although HbA1c did not differ significantly, suggesting that short-term glycemic parameters were more strongly associated with NAFLD than long-term glycemic control in this cohort. These findings support NAFLD as a marker of systemic metabolic dysfunction with clinically relevant renal implications. Early ultrasonographic screening for NAFLD and routine assessment of microalbuminuria, integrated with comprehensive management of glycemic control, blood pressure, weight, and dyslipidemia, may help identify high-risk patients earlier and reduce progression to chronic kidney disease and cardiovascular complications in patients with T2DM.
Declarations
Ethics approval and consent to participate: The study was approved by the Institutional Ethics Committee of Mysore Medical College and Research Institute, Mysuru, and conducted in accordance with the Declaration of Helsinki. Written informed consent was obtained from all participants.
Conflict of interest: The authors declare no conflict of interest.
Funding: No specific funding was received for this study.
Acknowledgements: The authors thank the Department of General Medicine and the Institutional Ethics Committee, Mysore Medical College and Research Institute, Mysuru, and all patients who participated in this study.
Author contributions: Both authors contributed to study conception and design, data collection and analysis, manuscript preparation, and approved the final manuscript.
Browning JD, Szczepaniak LS, Dobbins R, Nuremberg P, Horton JD, Cohen JC, Grundy SM, Hobbs HH. Prevalence of hepatic steatosis in an urban population in the United States: impact of ethnicity. Hepatology. 2004 Dec;40(6):1387-95. doi: 10.1002/hep.20466. PMID: 15565570.