Table 1.

Characteristics of the mothers and their newborns.

Characteristic	n	Mean ± SD (range) or percent	Median	25th–75th percentile
Maternal
Age (years)		1,616		27 ± 6.0 (14–45)		26		22–31
Weight (kg)a		1,612		45 ± 6.6 (25–74)		44		40–49
Height (cm)		1,616		150 ± 5.2 (134–170)		150		146–153
BMI (kg/m2)a		1,612		20 ± 2.6 (13–31)		20		18–21
< 18.5		488		30
≥ 18.5		1,127		70
Parity		1,616		1.4 ± 1.4 (0–8)		1		0–2
Primiparous		529		33
Multiparous		1,087		67
Urinary Cd (μg/L)a		1,616		0.81 ± 0.67 (0.044–7.0)		0.63		0.38–1.0
Urinary As (μg/L)a		1,509		152 ± 175 (1.2–1,235)		80		37–206
Hemoglobin (g/dL)b		1,504		11.6 ± 1.3 (8.0–17.3)		11.6		10.8–12.4
Tobacco smoking (yes/no)		1,562		(0/100)
Betel chewing (yes/no)		1,562		38/62
Newborns
Sex (male/female)		1,616		52/48
Gestational age (weeks)		1,611		39 ± 1.8 (29–45)		39		38–40
< 37		130		8
≥ 37		1,481		92
Weight (g)		1,616		2,672 ± 414 (1,059–4,000)		2,677		2,419–2,930
< 2,500		520		32
≥ 2,500		1,096		68
Length (cm)		1,603		48 ± 2.3 (38–60)		48		47–49
Head circumference (cm)		1,608		32 ± 1.6 (24–40)		33		31–34
Chest circumference (cm)		1,608		31 ± 2.2 (22–53)		31		30–33
aGestational week 8. bGestational week 14.