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Table 1 The baseline characteristics of participants

From: Elevated gamma-glutamyl transferase has a non-linear association with incident non-alcoholic fatty liver disease in the non-obese Chinese population: a secondary retrospective study

GGT (U/L) Q1 (<16) Q2 (16 to<21) Q3 (21 to<31) Q4 (≥31) P-value
Participants 2401 3077 3448 2980  
Age, years 42.63 ± 14.96 43.06 ± 15.01 43.39 ± 15.12 43.81 ± 14.63 0.028
Gender -n (%) < 0.001
 Female 1231 (51.27%) 1416 (46.02%) 1524 (44.20%) 1224 (41.07%)  
 Male 1170 (48.73%) 1661 (53.98%) 1924 (55.80%) 1756 (58.93%)  
BMI (kg/m2) 20.76 ± 1.93 21.17 ± 2.01 21.84 ± 2.01 22.42 ± 1.81 < 0.001
SBP (mmHg) 115.36 ± 15.70 119.93 ± 16.52 124.32 ± 16.26 127.66 ± 16.55 < 0.001
DBP (mmHg) 69.48 ± 9.39 72.20 ± 9.75 74.92 ± 10.14 77.11 ± 10.38 < 0.001
TC (mmol/L) 4.42 ± 0.70 4.54 ± 0.72 4.62 ± 0.72 4.79 ± 0.77 < 0.001
TG (mmol/L) 0.89 (0.70–1.14) 1.01 (0.79–1.33) 1.22 (0.92–1.65) 1.52 (1.11–2.16) < 0.001
HDL-c (mmol/L) 1.55 ± 0.35 1.49 ± 0.35 1.41 ± 0.35 1.36 ± 0.35 < 0.001
LDL-c (mmol/L) 2.13 ± 0.45 2.24 ± 0.47 2.32 ± 0.47 2.36 ± 0.46 < 0.001
ALT (U/L) 12.00 (10.00–16.00) 14.00 (11.00–18.00) 17.00 (14.00–23.00) 23.00 (17.00–32.00) < 0.001
AST (U/L) 19.00 (17.00–22.00) 20.00 (18.00–23.00) 21.50 (19.00–25.00) 24.00 (21.00–29.00) < 0.001
ALP (mmol/L) 62.52 ± 17.67 68.98 ± 19.42 74.28 ± 21.08 79.31 ± 25.74 < 0.001
ALB (U/L) 44.15 ± 2.75 44.49 ± 2.73 44.70 ± 2.78 44.71 ± 2.79 < 0.001
GLB (g/L) 29.01 ± 3.99 29.35 ± 3.97 29.39 ± 3.82 29.45 ± 4.07 < 0.001
TB (umol/L) 10.90 (8.30–14.10) 11.02 (8.40–14.30) 11.70 (8.91–14.90) 11.80 (9.20–15.20) < 0.001
DBIL (umol/L) 2.00 (1.40–2.75) 2.02 (1.44–2.78) 2.10 (1.50–2.80) 2.08 (1.44–2.83) 0.211
BUN (mmol/L) 4.34 ± 1.39 4.51 ± 1.33 4.67 ± 1.33 4.77 ± 1.55 < 0.001
Cr (umol/L) 74.30 ± 18.51 80.15 ± 19.96 86.74 ± 20.85 90.12 ± 34.70 < 0.001
UA (umol//L) 240.63 ± 78.66 273.12 ± 83.65 303.91 ± 79.35 339.09 ± 84.52 < 0.001
FBG (mmol/L) 5.02 ± 0.54 5.13 ± 0.68 5.24 ± 0.83 5.39 ± 1.06 < 0.001
  1. ALB albumin, ALP alkaline phosphatase, ALT alanine aminotransferase, AST aspartate aminotransferase, BMI body mass index, BUN blood urea nitrogen, Cr creatinine, DBIL Direct Bilirubin, DBP diastolic blood pressure, FPG fasting plasma glucose, GGT γ-glutamyl transpeptidase, GLB globulin, HDL-c high-density lipoprotein cholesterol, LDL-c low-density lipoprotein cholesterol, SBP systolic blood pressure, TB total bilirubin, TC total cholesterol, TG triglyceride, UA uric acid