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Table 2 Characteristics of study participants at enrollment and at each test

From: Point-of-care p24 antigen detection for early infant diagnosis of HIV infection: cross-sectional and longitudinal studies in Zambia

 

LYNX Hospital Study

NSEBA Study

Participants

(n = 183)

Tests

(n = 210)

Participants

(n = 1857)

Tests

(n = 2608)

Sex – female, n (%)

97 (53.0)

107 (51.0)

936 (50.4)

1361 (52.2)

Age groupa, n (%)

 Birth

0

0

1305 (70.3)

1305 (50.0)

 Postnatal

3 (1.6)

3 (1.4)

81 (4.4)

81 (3.1)

 6 weeks

74 (40.4)

74 (35.2)

247 (13.3)

502 (19.3)

 6 months

84 (45.9)

107 (51.0)

167 (9.0)

607 (23.3)

  > 7 months

22 (12.0)

26 (12.4)

57 (3.1)

113 (4.3)

 All routine after birth

180 (98.4)

207 (98.6)

471 (25.4)

1222 (46.9)

Median (IQR; range) age

 Overall (in weeks)

17.3 (7.9, 28.9; 2.0, 60.6)

23.5 (8.9, 29.0)

0.1 (0.0, 4.6; 0.0, 68.6)

0.9 (0.1, 18.3; 0.0, 104.1)

 Birth (in days)

0.4 (0.2, 0.8; 0.0, 6.7)

0.4 (0.2, 0.8; 0, 6.7)

 Postnatal (in days)

15.0 (14.0, 19.0; 14.0, 19.0)

15.0 (14.0, 19.0; 14.0, 19.0)

10.0 (8.0, 14.0; 7.0, 26.0)

10.0 (8.0, 14.0; 7.0, 26.0)

 6 weeks (in weeks)

7.3 (6.3, 10.1; 4.9, 12.9)

7.3 (6.3, 10.1; 4.9, 12.9)

7.1 (6.3, 8.4; 4.0, 12.9)

6.9 (6.3, 8.3; 4.0, 12.9)

 6 months (in months)

6.1 (4.6, 6.7; 3.1, 7.9)

6.1 (5.3, 6.7; 3.1, 7.9

5.7 (4.0, 6.6; 3.0, 7.9)

6.1 (5.7, 6.7; 3.0, 7.9)

  > 7 months (in months)

9.6 (8.3, 10.7; 8.1, 13.9)

9.4 (8.3, 10.7; 8.1, 13.9)

9.5 (8.5, 10.6; 8.0, 15.7)

9.4 (8.5, 10.7; 8.0, 23.9)

 All routine after birth (in months)

4.1 (1.9, 6.6; 1.1, 13.9)

5.4 (2.2, 6.8; 1.1, 13.9)

2.7 (1.6, 6.2; 0.9, 15.7)

5.2 (1.7, 6.5; 0.9, 23.9)

Mother received ART during pregnancy, n (%)

162 (88.5)

185 (88.1)

1661 (89.5)

2367 (90.9)

Child received prophylactic ART after birth, n (%)b

153 (83.6)

178 (84.5)

791 (88.4)

1477 (89.8)

Mother currently receiving combination ART, n (%)b

174 (95.6)

201 (96.2)

840 (94.2)

1575 (95.9)

  1. ART Antiretroviral therapy, IQR Interquartile range
  2. a Birth defined as 0–6 days; postnatal as 7–28 days; 6 weeks as 4–13 weeks; 6 months as 3–7 months; all routine after birth as 6 weeks, 6 months or > 7 months
  3. b Among participants tested after birth