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Table 2 Cumulative incidence rate (per-1000 months) of vertical transmission of HIV among children by 24 months according to selected characteristics

From: Incidence, prevalence and associated factors of mother-to-child transmission of HIV, among children exposed to maternal HIV, in Belgaum district, Karnataka, India

Characteristics Total person-months Number of infected babies Cumulative incidence rate 95% CI
Age of mother at pregnancy
  < 20 345 1 2.90 0.41 20.58
 20–24 3328 15 4.51 2.72 7.48
 25–29 3213 14 4.36 2.58 7.36
 30+ 989 8 8.09 4.05 16.18
Education of mother
 Illiterate 2650 15 5.66 3.41 9.39
 Primary school 1613 7 4.34 2.07 9.10
 Above primary school 3612 16 4.43 2.71 7.23
Working status of mother
 Not working 6722 33 4.91 3.49 6.91
 Working 1153 5 4.33 1.80 10.41
Know HIV positive status prior to pregnancy
 No 6153 29 4.71 3.28 6.78
 Yes 1686 9 5.34 2.78 10.26
Status of ART initiation by mother
 Not on ART 3836 18 4.69 2.96 7.45
 Started ART more than 90 days prior to delivery 1890 14 7.41 4.39 12.51
 Started ART within 90 days prior to delivery 1362 4 2.94 1.10 7.82
 Started ART after delivery 787 2 2.54 0.64 10.16
Sex of the child
 Boy 4036 22 5.45 3.59 8.28
 Girl 3839 16 4.17 2.55 6.80
Status of Nevirapine administration
 Any one given Nevirapine 978 3 3.07 0.99 9.51
 Both, mother and baby given Nevirapine 6573 29 4.41 3.07 6.35
 None given Nevirapine 325 6 18.48 8.30 41.14
Duration of breastfeeding
 Not breastfed 2553 4 1.57 0.59 4.18
 1–26 weeks 3864 23 5.95 3.96 8.96
 Above 26 weeks 1438 11 7.65 4.24 13.81
Mode of delivery
 Vaginal 6946 37 5.33 3.86 7.35
 Caesarean 930 1 1.08 0.15 7.64
Total 7875 38 4.83 3.51 6.63
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