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. 2012 Aug 31;12:138. doi: 10.1186/1471-2431-12-138

Table 1.

Frequencies of adverse pregnancy outcomes among 1229 HIV-infected pregnant women recruited in Lusaka, Zambia

  No. Ratio of event per 100 live-born infants
Miscarriage
36
3.1
Stillbirth
30
2.6
# of live-born infants with birth records
N = 1132
Ratea(95% CI)
Neonatal mortality (0–28 days)
47
0.043 (0.032–0.057)
Early mortality (0–70 days)
67
0.063 (0.050–0.079)
Birth Weightb
 
Percentage
<1500 g
15
1.3
1500–1999 g
33
2.9
2000–2499 g
113
10.1
≥2500 g
963
85.7
Mean ± SD, g
2947.7 ± 531.7
 
Gestationc
 
 
<32 weeks
94
8.4
32–33 weeks
88
7.9
34–36 weeks
260
23.3
≥37 weeks
672
60.3
Mean ± SD, weeks 37.6 ± 4.05  

a Calculated using Kaplan-Meier life table methods.

b 8 infants are missing data on birth weight and weight at 1 week visit.

c 18 infants are missing data on gestational weeks estimated at enrollment. Data suggested a systematic underestimation of gestation by 2–3 weeks. Thus we estimate that only 16.3% of births were preterm by conventional definitions of <37 weeks.