Volume 24, Number 10—October 2018
Research
Zika Virus Infection during Pregnancy and Effects on Early Childhood Development, French Polynesia, 2013–2016
Table 2
Characteristics and comparison of case-patients and controls in study of Zika virus infection during pregnancy and early childhood development, French Polynesia, 2013–2016*
Characteristics | Cases, n = 21 | Controls, n = 102 | p value† |
---|---|---|---|
Mother’s age at pregnancy, median (IQR) | 26.8 (22.1–35.7) | 27.8 (22.2–33.7) | NA |
15–24 | 8 (38) | 37 (36) | NA |
25–34 | 7 (33) | 43 (42) | NA |
>35 |
6 (29) |
22 (22) |
NA |
Estimated pregnancy start date, median (IQR) | 2013 Dec 11 (2013 Oct 23–2014 May 9) | 2013 Dec 8 (2013 Oct 16–2014 May 16) | |
January–September 2013 | 4 (19) | 19 (19) | NA |
October 2013–December 2014 | 9 (43) | 43 (42) | |
January–April 2014 | 2 (9) | 10 (10) | |
May–August 2014 |
6 (29) |
30 (29) |
|
Maternal socioeconomic status | |||
Low | 9 (43) | 34 (34) | 0.52 |
Middle | 4 (19) | 31 (31) | |
High |
8 (38) |
36 (36) |
|
Child’s birthweight, g | n = 11 | n = 100 | |
<1,500 | 0 | 2 (2) | |
1,500–2,500 | 3 (27) | 9 (9) | |
>2,500 |
8 (73) |
89 (89) |
|
Child’s sex | |||
F | 10 (48) | 42 (41) | 0.64 |
M |
11 (52) |
60 (59) |
|
Child’s ethnicity | |||
Polynesian | 14 (74) | 61 (71) | 0.56 |
Caucasian | 2 (11) | 2 (2) | |
Mixed/other |
3 (16) |
23 (27) |
|
Pregnancy outcome | |||
Termination of pregnancy | 10 (48) | NA | NA |
Gestational age at termination of pregnancy, median (IQR) | 25.5 (23–29) | NA | NA |
Live birth | 11 (52) | 102 (100) | NA |
Gestational age at child’s birth, median (IQR) | 39 (36–40) | 39 (38–40) | 0.23 |
Term, >37 weeks | 8 (73) | 85 (83) | |
Premature, 27–36 weeks |
3 (27) |
17 (17) |
|
Mother’s past infection with dengue viruses | |||
DENV-1 seropositivity | 17 (81) | 88 (87) | 0.50 |
DENV-2 seropositivity | 12 (57) | 50 (50) | 0.54 |
DENV-3 seropositivity | 16 (76) | 78 (77) | 0.99 |
DENV-4 seropositivity |
10 (48) |
52 (51) |
0.74 |
Other risk factors/confounders | |||
Family history of congenital abnormalities | 6 (29) | 24 (25) | 0.84 |
Drug use during pregnancy‡ | 9 (45) | 34 (33) | 0.23 |
Deltamethrin outdoor spraying during pregnancy | 10 (48) | 50 (51) | 0.73 |
*Values are no. (%) except as indicated. IQR, interquartile range; NA, not applicable.
†Likelihood ratio using conditional logistic regression.
‡Cannabis, cocaine, alcohol, or tobacco.
1These authors contributed equally to this article.