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Table 1 Characteristics of the 410 mother–newborn pairs in present study

From: Prenatal cadmium exposure is associated with shorter leukocyte telomere length in Chinese newborns

Variables Mean ± SD/
Median (IQR)/
Number (%)
Infant sex
 Male 206 (50.2)
 Female 204 (49.8)
Gestational age (weeks) 39.4 ± 1.2
Maternal age at delivery(years) 29.2 ± 3.4
Education
 Junior school or below 28 (6.8)
 High school 69 (16.8)
 College or above 313 (76.4)
Passive smoking during pregnancy
 Yes 133 (32.4)
 No 277 (67.6)
Prepregnancy BMI (kg/m2) 21.2 ± 3.0
Parity
 Primiparous 339 (82.7)
 Multiparous 71 (17.3)
Hypertensive disorders in pregnancy
 Yes 12 (2.9)
 No 398 (97.1)
Gestational diabetes mellitus
 Yes 41 (10.0)
 No 369 (90.0)
Relative cord blood TL 0.74 (0.56–0.92)
  1. Data presented as mean ± SD for normally distributed data, or median (IQR) for skewed distributed data, or numbers (percentage) for categorical data