Table 1 Characteristics of those who did and did not complete the AQ

Maternal age at birth

364

321

<.01

 <20

19 (5.2)

32 (10)

 20–24

65 (17.9)

73 (22.7)

 25–29

90 (24.7)

108 (33.6)

 30–34

119 (32.7)

76 (23.7)

 35+

71 (19.5)

32 (10)

Maternal education at pregnancy

364

321

<.01

 Completed secondary school

155 (42.6)

216 (67.3)

 Did not complete secondary school

209 (56.2)

105 (32.7)

Family income below poverty line

362

319

<.01

 Yes

115 (31.8)

149 (46.7)

 No

247 (66.4)

170 (53.3)

Maternal smoking in pregnancy

364

321

<.05

 None

291 (79.9)

224 (69.8)

 1–10 cigarettes daily

42 (11.5)

56 (17.4)

 11+ cigarettes daily

31 (8.5)

41 (12.8)

Maternal alcohol intake during pregnancy

364

321

<.05

 None

199 (54.7)

213 (66.4)

 Once a week or less

141 (38.7)

88 (27.4)

 Several times a week or more

24 (6.6)

20 (6.2)

Gestational age

364

321

.87

 <32 weeks

3 (0.8)

7 (2.2)

 32 to 37 weeks

64 (17.6)

48 (15.0)

 38 to 40 weeks

230 (63.2)

211 (65.7)

 >40 weeks

67 (18.4)

55 (17.1)

Proportion of optimal birth weight

370

333

.39

 <90

117 (31.6)

96 (28.8)

 90 to 110

206 (55.7)

184 (55.3)

 >110

47 (12.7)

53 (15.9)

Sex

372

333

.11

 Male

183 (49.2)

181 (54.4)

 Female

189 (50.8)

152 (45.6)

Apgar score

364

320

.94

 Generally normal

351 (96.4)

309 (96.6)

 Fairly low

13 (3.6)

11 (3.4)

 Critically low

0

0

Parity

372

333

.51

 0

167 (44.9)

159 (47.7)

 1

121 (32.5)

96 (28.8)

 >1

84 (22.6)

78 (23.4)