Outcome summary treatment v. no treatment for asymptomatic bacteriuria among pregnant women
| Outcome | No. of studies | Women treated (n/N) | Women not treated (n/N) | RR (95% CI) | Absolute difference per 1000 (95% CI) | ARR, % | Quality of evidence |
|---|---|---|---|---|---|---|---|
| Pyelonephritis | 12 4,6,20,22–29,30 | 55/1023 | 198/994 | 0.24 (0.13 to 0.41) | 176 fewer (137 fewer to 202 fewer) | 17.6 | Low |
| Low birth weight | 74,6,22,25,27,29,31 | 64/769 | 100/753 | 0.63 (0.45 to 0.90) | 44 fewer (12 fewer to 65 fewer) | 4.4 | Low |
| Perinatal mortality | 64,6,22,25,29,31 | 16/529 | 21/575 | 0.96 (0.27 to 3.39) | 2 fewer (29 fewer to 97 more) | 0.2 | Very low |
| Spontaneous abortion | 230,31 | 4/222 | 6/157 | 0.60 (0.11 to 3.10) | 13 fewer (30 fewer to 70 more) | 1.3 | Very low |
| Neonatal sepsis | 24,32 | 0/77 | 2/77 | 0.22 (0.01 to 4.54) | 17 fewer (22 fewer to 79 more) | 1.7 | Very low |
| Preterm delivery | 44,30–32 | 34/299 | 39/234 | 0.57 (0.21 to 1.56) | 68 fewer (125 fewer to 88 more) | 6.8 | Very low |
| Fetal anomalies | 44,22,25,30 | 4/425 | 10/396 | 0.49 (0.17 to 1.43) | 9 fewer (15 fewer to 8 more) | 0.9 | Very low |
Note: ARR = absolute risk reduction, CI = confidence interval, RR = risk ratio.