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Table 2 Comparison of MWS characteristics between matched participants and others of a similar age

From: Lifetime body size and reproductive factors: comparisons of data recorded prospectively with self reports in middle age

Variable Matched
participants
MWS cohort born
± 1 yr of NSHD
P
difference*
Number of women at baseline 541 217,828  
Number of women at resurvey 368 135,417  
Age at baseline, yr, mean 52.1 52.1  
Deprivation, % most deprived tertile 27.3 33.1 0.01
Maternal vital status, % alive 35.6 38.1 0.33
Self-reported at recruitment in the MWS    
   Height, cm, mean (SD) 162.6 (6.4) 162.1 (6.7) 0.07
   Weight, kg, mean (SD) 68.8 (13.2) 68.7 (12.9) 0.78
   BMI, kg/m2, mean (SD) 26.0 (4.6) 26.1 (4.8) 0.35
   Age at menarche, yr, mean (SD) 13.2 (1.5) 13.3 (1.6) 0.02
   Age at menopause, yr, mean (SD) 48.0 (5.0) 47.3 (5.8) 0.03
   Use of oral contraceptives, % ever 72.2 73.0 0.66
Self-reported at resurvey in the MWS    
   Birth weight, kg, mean (SD) 3.24 (0.68) 3.22 (0.69) 0.69
   Mother's height, cm, mean (SD) 160.6 (7.1) 160.4 (6.8) 0.61
   Father's height, cm, mean (SD) 174.1 (7.7) 174.3 (7.8) 0.63
   Waist circumference, cm, mean (SD) 75.8 (9.1) 75.7 (9.3) 0.96
   Hip circumference, cm, mean (SD) 99.9 (8.1) 99.6 (7.8) 0.52
   Waist-to-hip ratio, mean (SD) 0.76 (0.06) 0.76 (0.06) 0.38
   Waist-to-height ratio, mean (SD) 0.47 (0.06) 0.47 (0.06) 0.99
   Whether breastfed, % ever breastfed 73.0 69.7 0.23
   Body size, age 10    
% thinner 25.8 29.9 0.23
% average 56.0 52.4  
% plumper 18.2 17.7  
   Body size, age 20    
% size < 12 29.8 31.7 0.27
% size 12-14 58.1 58.4  
% size 16+ 12.1 9.9  
   Clothes size    
% size < 14 30.9 32.0 0.18
% size 14-16 44.8 49.1  
% size 18+ 24.3 18.9  
   Bra band size    
% size 36 22.8 23.9 0.34
% size 36-38 56.0 59.4  
% size 40+ 21.3 16.7  
  1. MWS: Million Women Study. NSHD: National Survey of Health and Development.
  2. * P from ANOVA for continuous variables and from chi-squared tests of association for categorical variables.