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Table 3 Multivariate logistic regression showing risk factors for LBW in HAART-exposed women irrespective of infant HIV status

From: Birth outcomes in South African women receiving highly active antiretroviral therapy: a retrospective observational study

Variable

Low Birth Weight (<2500 g)

 

Early HAART

Late HAART

 

Univariate analysis

Multivariate analysis (n = 341)

Univariate analysis

Multivariate analysis (n = 343)

 

OR (95% CI)

AOR (95% CI)

P

OR (95% CI)

AOR (95% CI)

P

HAART-unexposed

1.00

1.00

 

1.00

1.00

 

HAART-exposed

      

PI-based

0.58 (0.33-1.07)

0.45 (0.19-1.06)

0.068

0.58 (0.36-0.93)

0.52 (0.28-0.98)

0.04

NVP-based

0.58 (0.33-1.01)

0.38 (0.18-0.81)

0.01

0.76 (0.40-1.41)

0.70 (0.33-1.47)

0.34

EFV-based

1.86 (1.06-3.28)

1.02 (0.46-2.25)

0.96

0.73 (0.19-2.71)

0.51 (0.10-2.72)

0.43

CD4 cell count

      

per category increase*

0.71 (0.60-0.83)

0.57 (0.45-0.71)

<0.001

0.94 (0.79-1.13)

0.91 (0.73-1.15)

0.45

Maternal age

      

16-24 years

1.0

1.0

 

1.0

1.0

 

25-29 years

1.24 (0.67-2.28)

0.80 (0.35-1.83)

0.60

0.96 (0.53-1.74)

0.98 (0.45-2.15)

0.96

30-34 years

1.45 (0.80-2.62)

1.19 (0.54-2.58)

0.67

1.26 (0.72-2.24)

0.81 (0.37-1.76)

0.60

≥35 years

2.02 (1.03-3.96)

1.71 (0.70-4.16)

0.24

1.40 (0.72-2.73)

1.62 (0.70-3.73)

0.26

Hypertension

      

no

1.00

1.00

 

1.00

1.00

 

yes

2.47 (1.18-5.17)

2.10 (0.92-4.82)

0.08

1.12 (0.48-2.60)

0.97 (0.40-2.36)

0.94

Infant PCR

      

Negative

1.00

1.00

 

1.00

1.00

 

Positive

2.54 (1.30-4.96)

3.28 (1.20-8.97)

0.020

1.93 (0.09-3.43)

2.37 (1.17-4.79)

0.02

  1. HAART - highly active antiretroviral treatment; early HAART - HAART initiation <28 weeks of pregnancy; late HAART - HAART initiation at ≥28 weeks of pregnancy; PI - protease inhibitor, NVP - nevirapine; EFV - efavirenz; OR - odds ratio; AOR - adjusted odds ratio; CI (95%) - 95% confidence interval * CD4 cell categories (cells/mm3): 0-49 (baseline category), 50-99, 100-149, 150-199 and 200-250