Table 1:
Outcome summary of screening versus no screening for asymptomatic bacteriuria among pregnant women
| Outcome | No. of studies | Women screened (n/N) | Women not screened (n/N) | RR (95% CI) | Absolute difference per 1000 (95% CI) | ARR, % | ARI, % | Quality of evidence |
|---|---|---|---|---|---|---|---|---|
| Pyelonephritis | 316–18 | 10/2008 | 67/3651 | 0.28 (0.15 to 0.54) | 13 fewer (8 fewer to 16 fewer) | 1.3 | – | Very low |
| Perinatal mortality | 217,18 | 6/349 | 7/375 | 1.21 (0.01 to 102.93) | 4 more (19 fewer to 1000 more) | – | 0.4 | Very low |
| Spontaneous abortion | 117 | 9/170 | 11/200 | 0.96 (0.41 to 2.27) | 2 fewer (32 fewer to 70 more) | 0.2 | Very low | |
| Preterm delivery | 217,18 | 33/347 | 5/375 | 8.70 (0.32 to 240.07) | 102 more (9 fewer to 1000 more) | – | 10.2 | Very low |
| Fetal anomalies | 117 | 3/186 | 2/186 | 1.50 (0.25 to 8.87) | 5 more (8 fewer to 85 more) | – | 0.5 | Very low |
Note: ARI = absolute risk increase, ARR = absolute risk reduction, CI = confidence interval, RR = risk ratio.