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Table 2 Associations between antenatal attendance, and access to other services and birth outcomes in worst case scenario (women with unknown attendance classified as not having attended ANC)

From: Attendance at antenatal clinics in inner-city Johannesburg, South Africa and its associations with birth outcomes: analysis of data from birth registers at three facilities

Variable

Univariate odds ratio

P

Multivariate odds ratio

P

Had an HIV test

 Attended ANC

  Yes

1.0

<0.001

1.0

<0.001

  No

0.04 (0.04–0.05)

0.05 (0.05–0.06)

 Site

  Primary level

1.0

 

1.0

 

  Secondary level

3.38 (3.04–3.76)

<0.001

3.01 (2.66–3.41)

<0.001

  Tertiary level

6.74 (6.25–7.27)

<0.001

5.36 (4.92–5.85)

<0.001

Had a Caesarean section

 Attended ANC

  Yes

1.0

<0.001

1.0

<0.001

  No

0.34 (0.31–0.38)

0.39 (0.35–0.44)

 Site

  Secondary level

1.0

<0.001

1.0

<0.001

  Tertiary level

3.75 (3.47–4.05)

3.35 (3.10–3.63)

 HIV status

  Negative

1.0

 

1.0

 

  Positive

1.06 (1.00–1.13)

0.04

1.0 (0.94–1.06)

0.98

  Unknown

0.50 (0.45–0.56)

<0.001

0.64 (0.57–0.72)

<0.001

 Gestation at childbirth

  Term or post-term

1.0

<0.001

1.0

<0.001

  Preterm

1.46 (1.37–1.56)

1.24 (1.17–1.33)

Preterm birth

 Attended ANC

  Yes

1.0

0.77

1.0

<0.001

  No

1.01 (0.92–1.11)

1.59 (1.40–1.79)

 Site

  Primary level

1.0

<0.001

1.0

<0.001

  Secondary level

3.34 (2.07–5.40)

5.41 (3.34–8.78)

  Tertiary level

106.6 (72.5–156.9)

<0.001

216.9 (146.1–322.1)

<0.001

 Infant sex

  Male

1.0

0.55

-

-

  Female

0.98 (0.92–1.05)

 HIV status

  Negative

1.0

<0.001

1.0

<0.001

  Positive

1.25 (1.16–1.33)

1.33 (1.23–1.43)

  Unknown

1.13 (1.03–1.24)

<0.001

4.01 (3.53–4.55)

<0.001

Stillbirtha

 Attended ANC

  Yes

1.0

<0.001

1.0

0.02

  No

2.0 (1.6–2.4)

1.40 (1.06–1.85)

 Site

  Primary level

1.0

0.78

1.0

0.08

  Secondary level

0.92 (0.50–1.67)

1.73 (0.93–3.19)

  Tertiary level

6.57 (4.59–9.40)

<0.001

16.6 (11.2–24.7)

<0.001

 HIV status

  Negative

1.0

 

1.0

 

  Positive

1.12 (0.90–1.38)

0.31

1.09 (0.87–1.36)

0.46

  Unknown

2.38 (1.93–2.93)

<0.001

4.24 (3.29–5.48)

<0.001

 Delivery mode

  Vaginal delivery

1.0

0.14

1.0

<0.001

  Caesarean section

0.87 (0.72–1.05)

0.5 (0.4–0.6)

 Infant sex

  Male

1.0

0.004

1.0

0.004

  Female

0.77 (0.65–0.92)

0.76 (0.64–0.92)

  1. Caesarean sections are not done at HCHC. No births considered post-term. Worst case scenario is the number of women who attended ANC among all women (women with unknown attendance classified as not having attended ANC)
  2. aIncludes death shortly after birth