Table 1 Characteristics of mothers and their children (born 2002–2004), INUENDO cohort

Mother

Age at baseline interview (years), mean (SD)

27 (6)

25 (5)

29 (3)

Parity, child, n (%)

1st

164 (33)

401 (82)

86 (95)

2nd/3rd

244 (49)

91 (18)

5 (5)

4th or more

88 (18)

0 (0)

0 (0.0)

Smoking before pregnancy, n (%)

Yes

379 (87)

112 (31)

18 (47)

No

55 (13)

250 (69)

20 (53)

Alcohol before pregnancy, n (%)

≤7 servings/week

460 (88)

492 (100)

86 (95)

>7 servings/week

60 (12)

0 (0)

5 (5)

Educational level, Finished education at age (years), n (%)

≤15

44 (10)

25 (6)

0 (0)

16-17

169 (36)

116 (27)

0 (0)

≥18

248 (54)

292 (67)

89 (100)

Child

Sex, n (%)

Male

280 (54)

260 (53)

54 (59)

Female

238 (46)

229 (47)

37 (41)

Age at follow-up (years), mean (SD)

8 (1)

7 (1)

8 (1)

Breastfeeding duration (months), n (%)

0

17 (4)

42 (9)

2 (2)

<6

118 (25)

164 (33)

19 (21)

6-12

124 (26)

177 (36)

37 (41)

>12

211 (45)

107 (22)

33 (36)

Gestational age at birth (weeks), n (%)

≥37

496 (95)

483 (98)

87 (96)

<37

24 (5)

9 (2)

4 (4)

Exposure

CB-153, ng/g lipid, Median (10–90 percentile)

107 (30–369)

27 (11–54)

11 (3–24)

p,p′-DDE ng/g lipid, Median (10–90 percentile)

300 (78–959)

639 (329–1303)

440 (160–718)

Outcome

Crawling (months), Mean age (SD)

6.5 (2)

6.9 (2)

9.0 (8)

Standing-up (months), Mean age (SD)

8.8 (2)

8.9 (3)

9.8 (5)

Walking (months), mean age (SD)

12.2 (2)

11.2 (1)

12.6 (4)

DCDQ-score < 8 years (points) Median [10–90 percentile]

62 [49–73]

46 [37–55]

64 [51–73]

DCDQ-score ≥ 8 years (points) Median [10–90 percentile]

62 [51–75]

47 [29–58]

67 [58–74]