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. 2018 May 4;18:135. doi: 10.1186/s12884-018-1791-4

Table 5.

Association between obstetric factors and GBS colonization among pregnant women at three health institutions (n = 281)

Obstetric Factors Total GBS culture COR (95% C.I) p-valuea AOR (95% C.I) p-valueb
GBS negative
N (%)
GBS positive
N (%)
ANC visit
 One times 6 5(83.3) 1(16.7) 1.12 (0.13–10.1) 0.917
 Two times 37 32(86.5) 5(13.5) 0.88 (0.31–2.51) 0.808
 Three times 99 85(85.9) 14(14.1) 0.93 (0.45–1.92) 0.836
 Four times 139 118(85.4) 21(14.6) 1
Type of Gravida
 Primigravida 88 74(84.1) 14(15.9) 1.16 (0.58–2.35) 0.673
 Multigravida 193 166(86) 27(14) 1
Still birth
 No 268 228(85.1) 40(14.9) 1
 Yes 13 12(92.3) 1(7.7) 0.48 (0.06–3.76) 0.480
Abortion
 No 211 180(85.3) 31(14.7) 1
 Yes 70 60(85.7) 10(14.3) 0.97 (0.45–2.09) 0.934
HIV Infection
 No 256 221(86.3) 35 (13.7) 1 1
 Yes 25 19 (76) 6 (24) 1.99 (0.75–5.34) 0.170 2.8 (0.97–8.11) 0.057

1logical reference; CI Confidence interval, COR Crude odds ratio, AOR Adjusted odds ratio, N Number; % Percentage; a p-value obtained by binary; b p-value obtained by multiple logistic regression; Adjusted for HIV status