β sitosterols v placebo for benign prostatic hyperplasia*
| Outcomes at 4 to 24 wk | Number of studies | Weighted mean difference (95% CI) |
|---|---|---|
| *IPSS = International Prostate Symptom Scale; QoL = quality of life. | ||
| IPSS scores | 2 | −4.9 (−6.3 to −3.5) |
| Boyarsky QoL score | 1 | −4.5 (−6.0 to −3.0) |
| Nocturia (times/evening) | 1 | −1.0 (−1.8 to −0.3) |
| Peak urine flow (ml/s) | 4 | 3.9 (0.9 to 6.9) |
| Mean urine flow (ml/s) | 1 | 2.6 (1.3 to 3.9) |
| Residual volume (ml) | 4 | −28.6 (−41.4 to −15.8) |