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Table 2 General characteristics of 3250 participants of the Nutrition and Health Survey according to dietary fiber intake categories

From: Association of dietary fiber intake with newly-diagnosed type 2 diabetes mellitus in middle-aged Chinese population

Characteristics Dietary fiber intake P-value*
Q1(2.1 ~ 9.8 g)
(n = 812)
Q2(~ 13.5 g)
(n = 813)
Q3(~ 21.4 g)
(n = 813)
Q4(~ 55.7 g)
(n = 812)
Age(years) 48.5 ± 1.7 51.3 ± 1.4 50.9 ± 1.5 52.4 ± 1.9 < 0.0001
BMI(kg/m2) 26.2 ± 4.5 25.1 ± 4.7 24.9 ± 4.1 23.6 ± 5.3 < 0.0001
Obesity[n(%)] 138(17.0) 89(10.9) 67(8.2) 46(5.7) < 0.0001
Hypertension[n(%)] 203(22.8) 174(20.8) 176(21.9) 150(20.7) 0.017
T2DM[n(%)] 59(7.3) 50(6.2) 41(5.0) 32(3.9) < 0.0001
Gender (%)      χ2 = 7.331
0.062
 Men 416(51.2) 409(50.3) 369(45.4) 382(47.0)  
 Women 396(49.8) 404(49.7) 444(54.6) 430(53.0)  
Smoking status(%)      χ2 = 60.388
< 0.0001
 Never-smokers 379(46.7) 403(50.0) 398(49.0) 496(61.1)  
 Former-smokers 273(33.6) 262(32.2) 258(31.7) 244(30.0)  
 Current-smoker 160(19.7) 148(17.8) 157(19.3) 72(8.9)  
Education[n(%)]      χ2 = 52.182
< 0.0001
  < High school 137(16.9) 217(26.7) 200(24.6) 225(27.7)  
 High school 458(56.4) 455(56.0) 468(57.6) 450(55.4)  
  > High school 217(26.7) 141(17.3) 145(17.8) 137(16.9)  
Income/per month/ person (%)      χ2 = 29.061
< 0.0001
  < 2000(RMB) 275(33.9) 297(36.5) 307(37.8) 341(42.0)  
 2000-5000(RMB) 412(50.7) 385(47.4) 410(50.4) 398(49.0)  
  > 5000(RMB) 125(15.4) 131(16.1) 96(11.8) 73(9.0)  
 Physical activity (METs-h/week) 23.2 ± 2.88 22.9 ± 2.17 26.5 ± 2.91 30.6 ± 3.09 < 0.0001
 Total energy intake (kcal/d) 2194.5 ± 524.7 2203.2 ± 549.6 2094.8 ± 519.7 1807.8 ± 512.0 < 0.0001
  1. Categorical variables are presented as sum and percentages, and continuous variables are presented as Mean ± SD. Abbreviation: Q1 Quartile 1, BMI Body mass index, T2DM Type 2 diabetes mellitus, RMB Ren min bi. * P values were derived by chi-square tests for categorical variables and ANOVA tests for continuous variables