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Table 1 Baseline characteristics of women who filled out the 173-item FFQ and/or wore an accelerometera

From: Preconception lifestyle intervention reduces long term energy intake in women with obesity and infertility: a randomised controlled trial

  Intervention (N = 92) Control (N = 100) P-value
Age (mean; SD) 30.4 (4.1) 29.9 (4.5) 0.43
Caucasian (%; N) 93.5 (86) 95.0 (95) 0.65
Body Mass Index (kg/m2; mean; SD)b 35.9 (3.3) 35.8 (3.1) 0.73
Education level (%; N)    
 No education or primary school (4–12 years) 4.5 (4) 1.0 (1) 0.52
 Secondary education 20.2 (18) 21.4 (21)
 Intermediate Vocational Education 51.7 (46) 55.1 (54)
 Higher Vocational Education and University 23.6 (21) 22.4 (22)
Smoking (yes; %; N) 22.0 (20) 17.2 (17) 0.40
Nulliparous (yes; %; N) 75.0 (69) 73.0 (73) 0.75
Anovulatory (yes; %; N) 46.7 (43) 53.0 (53) 0.39
PCOS (yes; %; N) 35.9 (33) 42.0 (42) 0.38
Duration infertility (months; median; IQR) 22.0 (15.0; 37.0) 17.0 (13.0; 25.8) 0.02
Pregnant after randomisation (yes; %; N)c 68.5 (63) 76.0 (76) 0.24
  1. aFor continuous data independent sample Student’s t-tests and for categorical data Chi-square tests were used to compare both groups. PCOS = Polycystic Ovary Syndrome
  2. bBMI was measured by research nurses during hospital visit
  3. cPregnancy of at least 24 weeks