Clinical and demographic characteristics of the study groups

CategoryControls
(n = 200)
Mean ± SD
95% CIPatients
(n = 200)
Mean ± SD
95% CIP value
Age (years)23.346 ± 2.39817.326–27.21224.320 ± 1.81917.321–31.2350.023
Hb (g/dL)10.899 ± 0.2548.235–12.29111.894 ± 1.2938.991–13.3130.544
BMI (kg/m2)26.129 ± 3.39123.917–27.12027.250 ± 3.32024.175–32.1890.678
Age at menarche (years)12.010 ± 1.21210.102–14.23112.960 ± 1.12010.452–15.0220.019
Age at first conception (years)20.754 ± 2.63318.179–23.21321.658 ± 3.1518.899–24.2110.235
Mean gestational age (months)5.890 ± 0.7113.900–7.6606.261 ± 2.0104.100–8.0400.385

t-test was carried out for clinical and demographic data. Hb: hemoglobin; BMI: body mass index; CI: confidence interval