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Table 1 Subject characteristics*

From: Relationship between blood lipid profiles and pancreatic islet β cell function in Chinese men and women with normal glucose tolerance: a cross-sectional study

Characteristic Men (n = 893) Women (n = 1454) p value
Age (years) 42.6 ± 14.9 43.3 ± 14.2 NS
Family history of diabetes (%) 11.9 12.3 NS
Cigarette smoking (%) 49.7 4.3 < 0.001
Alcohol drinking (%) 55.5 11.5 < 0.001
Education    
College or above (%) 32.6 25.0 < 0.01
Middle school (%) 39.1 40.1 NS
Primary school or below (%) 28.3 34.9 < 0.01
Income (per year)    
≥10000 yuan RMB (%) 32.7 27.6 < 0.01
<10000 yuan RMB (%) 67.3 72.4 < 0.01
Regular leisure-time physical activity (%) 58.5 62.6 NS
BMI (kg/m2) 22.7 ± 3.2 22.3 ± 3.4 NS
WC (cm) 81.1 ± 9.7 78.1 ± 9.8 NS
WHR 0.88 ± 0.08 0.82 ± 0.08 0.019
SBP (mmHg) 115.7 ± 16.5 111.3 ± 17.7 NS
fasting plasma glucose (mg/dl) 83.5 ± 9.6 83.2 ± 9.1 NS
0.5-h plasma glucose (mg/dl) 143.4 ± 30.4 135.7 ± 28.1 NS
2-h plasma glucose (mg/dl) 96.2 ± 21.6 99.3 ± 19.1 NS
Fasting insulin(μU/ml) 6.3 (4.4, 8.8) 6.6 (4.7, 9.3) NS
0.5-h insulin (μU/ml) 28.4 (13.2, 42.1) 33.2 (13.0, 48.2) < 0.01
2-h insulin (μU/ml) 15.2 (8.0, 28.8) 19.4 (11.3, 37.1) 0.023
TC (mg/dl) 173.9 ± 35 176.1 ± 38.2 NS
TG (mg/dl) 98.2 (74.3, 136.3) 112.4 (81.4, 165.5) 0.01
HDL-C (mg/dl) 48.2 ± 16.4 52.5 ± 13.9 NS
LDL-C (mg/dl) 106.3 ± 30.9 105.1 ± 31.9 NS
  1. Data were expressed as means ± standard deviation, median (interquartile range), or percentage for normally distributed continuous various, abnormally distributed continuous variables, and categorical variables, respectively. Abnormally distributed variables were logarithmically transformed before analysis. Between-group comparisons were conducted using Student’s t test or χ 2 tests. NS: not significant; BMI: body mass index; WC: waist circumference; WHR: waist/hip ratio; SBP: systolic blood pressure; TG: triglyceride; TC: total cholesterol; HDL-C: high-density lipoprotein–cholesterol; LDL-C: low-density lipoprotein–cholesterol. Cigarette smoking was defined as having smoked at least 100 cigarettes in one’s lifetime. Alcohol consumption was defined as consumption of ≥ 30 g of alcohol per week for 1 year or more. Regular leisure-time physical activity was defined as participation in ≥ 30 min of moderate or vigorous activity per day at least 3 days per week.