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Table 2 Baseline characteristics of respondents and non-respondents stratified by sex; Tehran Lipid and Glucose study (TLGS) (1999–2018)

From: Sex differences in the association between spousal metabolic risk factors with incidence of type 2 diabetes: a longitudinal study of the Iranian population

  Women Men
Variables Respondent n = 1952 Non-respondent n = 618 P value Respondent n = 1833 Non-respondent n = 683 P value
Age (years) 39.7 (11.1) 38.9 (11.6) 0.173 45.8 (12.3) 46.5 (13.4) 0.248
BMI (kg/m2) 27.6 (4.5) 28.2 (5.1) 0.022 26.1 (3.7) 25.9 (4.1) 0.250
Waist circumference (cm) 87.3 (11.6) 88.4 (12.3) 0.066 89.9 (10.3) 89.1 (10.9) 0.092
SBP (mmHg) 115.1 (16.9) 115.3 (18.8) 0.851 119.1 (17.1) 119.9 (18.8) 0.354
DBP (mmHg) 76.5 (10.3) 75.8 (11.2) 0.183 77.7 (10.8) 78.1 (11.4) 0.575
TG/HDL-C 3.6 (2.9) 3.9 (4.2) 0.085 5.4 (4.7) 5.2 (4.2) 0.411
FPG (mmol/L) 4.9 (0.5) 4.9 (0.5) 0.940 5.1 (0.5) 5.1 (0.5) 0.975
Education
 < 6 years of schooling 549 (28.1) 178 (28.8) 0.878 452 (24.6) 185 (27.1) 0.457
 6–12 years of schooling 1225 (62.8) 381 (61.7) 1044 (57.0) 375 (54.9)
 > 12 years of schooling 178 (9.1) 59 (9.5) 337 (18.4) 123 (18.0)
Family history of diabetes 538 (27.6) 170 (27.5) 0.975 457 (24.9) 164 (24.0) 0.634
Prevalent CVD 50 (2.6) 17 (2.8) 0.773 90 (4.9) 52 (7.6) 0.011
Smoking status
 Never 1854 (95.0) 577 (93.5) 0.361 864 (47.1) 374 (54.8) < 0.001
 Past 30 (1.5) 14 (2.2) 240 (13.1) 101 (14.7)
 Current 68 (3.5) 27 (4.3) 729 (39.8) 208 (30.5)
Physical activity level
 Low physically active 1421 (72.8) 472 (76.4) 0.090 1338 (72.9) 464 (67.9) 0.666
Lipid-lowering medication 30 (1.5) 13 (2.1) 0.368 20 (1.1) 8 (1.2) 0.833
Antihypertensive medication 85 (4.4) 31 (5.0) 0.505 64 (3.5) 35 (5.1) 0.061
  1. Mean (SD) are shown for continuous variables and P value is calculated with t test; frequency (%) are shown for categorical variables with P value based on chi-square test
  2. BMI body mass index, CVD cardiovascular disease, FPG fasting plasma glucose, SBP systolic blood pressure, DBP diastolic blood pressure, TG/HDL-C triglyceride to high-density lipoprotein cholesterol ratio, SD standard deviation