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Table 1 The descriptive characteristics of 12,829 retired Chinese women of The DFTJ Cohort, by number of parity

From: Association between parity and obesity patterns in a middle-aged and older Chinese population: a cross-sectional analysis in the Tongji-Dongfeng cohort study

Variable Parity
1 2 3 ≥4 χ 2/F P for trend
(n = 4362) (n = 4410) (n = 2543) (n = 1514)
Age (years) (mean ± SD) 58.61 ± 4.69 64.84 ± 5.46 69.88 ± 6.01 74.36 ± 5.97 4252.18** <0.001
Education level 2561.64** <0.001
 Primary school or illiteracy (%) 415 (9.6) 1184 (27.0) 1116 (44.2) 1022 (68.1)   
 Middle school (%) 1742 (40.1) 1858 (42.3) 973 (38.5) 378 (25.2)  
 High school (%) 1767 (40.7) 1049 (23.9) 362 (14.3) 77 (5.1)  
 College or higher (%) 416 (9.6) 298 (6.8) 73 (2.9) 23 (1.5)  
Marital status 828.61** <0.001
 Single (%) 6 (0.1) 3 (0.1) 3 (0.1) 1 (0.1)   
 Married or Remarried (%) 3892 (89.7) 3692 (84.0) 1988 (78.6) 990 (65.6)  
 Divorced (%) 169 (3.9) 108 (2.5) 22 (0.9) 4 (0.3)  
 Widowed (%) 274 (6.3) 593 (13.5) 515 (20.4) 515 (34.1)  
Physical activity (%) 3918 (89.8) 3925 (89.0) 2221 (87.3) 1226 (81.0) 89.25** <0.001
Current/Former smoker (%) 61 (1.4) 105 (2.4) 115 (4.5) 121 (8.0) 184.87** <0.001
Passive smoking (%) 1500 (35.0) 1193 (27.6) 587 (23.6) 333 (22.4) 146.58** <0.001
Current/Former alcohol drinker (%) 548 (12.6) 479 (10.9) 251 (9.9) 124 (8.2) 26.87** <0.001
Current tea drinker (%) 1841 (42.2) 1603 (36.4) 824 (32.4) 403 (26.6) 144.00** <0.001
Diabetes Mellitus (%) 406 (9.3) 662 (15.1) 523 (20.7) 344 (22.8) 222.34** <0.001
Hypertension (%) 1337 (30.7) 1966 (44.6) 1368 (53.9) 888 (58.7) 553.88** <0.001
Ever used Contraceptives (%) 845 (19.5) 885 (20.2) 434 (17.2) 153 (10.2) 83.26** <0.001
Hormone replacement therapy (%) 160 (3.7) 113 (2.6) 52 (2.1) 13 (0.9) 40.64** <0.001
Menopause (%) 4090 (93.8) 4333 (98.3) 2523 (99.3) 1495 (98.7) 238.61** <0.001
Abortion frequency 519.00** <0.001
 0 time (%) 1033 (24.3) 1497 (35.1) 1033 (42.1) 772 (53.1)   
 1 time (%) 1434 (33.7) 1328 (31.1) 764 (31.1) 364 (25.0)  
 2 or more times (%) 1786 (42.0) 1441 (33.8) 658 (26.8) 318 (21.9)  
  1. Numerical data are presented as mean ± SD and tested with F test; Categorical data are presented with percentage in parentheses after the numbers and tested with χ 2 test
  2. **P < 0.001