Trials | Year | Expected observed | Expected total | Controls observed | Controls total | ERR (95% CI) | ERD (95% CI) | NNT (95% CI) |
---|---|---|---|---|---|---|---|---|
Durandet al 34 | 1995 | 2 | 23 | 4 | 20 | 0.43 (0.08, 2.37) | −11.30 (−32.28, 9.67) | |
Brozanskiet al 35 | 1995 | 2 | 39 | 9 | 39 | 0.22 (0.05, 1.03) | −17.95 (−32.87, −3.02) | |
Yeh et al 38 | 1994 | 28 | 75 | 20 | 67 | 1.25 (0.70, 2.22) | 7.40 (−8.01, 22.97) | |
Cummings et al 37 | 1989 | 3 | 12 | 6 | 11 | 0.46 (0.11, 1.83) | −29.55 (−67.84, 8.74) | |
Kari et al 36 | 1993 | 1 | 17 | 3 | 24 | 0.24 (0.01, 4.70) | −6.62 (−23.94, 10.71) | |
Shinwellet al 31 | 1996 | 31 | 132 | 22 | 116 | 1.24 (0.72, 2.14) | 4.52 (−5.64, 14.68) | |
Rastogiet al 30 | 1996 | 4 | 36 | 2 | 34 | 1.89 (0.35, 10.31) | 5.23 (−7.73, 18.19) | |
Sander et al 32 | 1994 | 2 | 19 | 7 | 21 | 0.32 (0.07, 1.52) | −22.81 (−47.24, 1.63) | |
Tapia et al 39 | 1996 | 17 | 55 | 18 | 54 | 0.93 (0.48, 1.80) | −2.42 (−19.95, 15.10) | |
Yeh et al 33 | 1990 | 3 | 28 | 8 | 29 | 0.39 (0.10, 1.46) | −16.87 (−36.77, 3.02) | |
Pooled [χ214.00 (df=9)] | 93 | 436 | 98 | 415 | 0.88 (0.69, 1.13) | −3.44 (−8.57, 1.68) |