Weighted mean raw differences in effect of Z drugs (treatment) or placebo on insomnia
| Weighted mean differences (95% CI) | Homogeneity of effect sizes I2 (95% CI) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Within groups | Between groups | |||||||||
| No* | Treatment | Control | No* | Treatment v control | Treatment | Control | Treatment v Control | |||
| Primary outcome-sleep latency | ||||||||||
| PSG | 14 | −42 (−60 to −23) | −20 (−28 to −11) | 14 | −22 (−33.00 to −11.00) | 96 (94.75 to 97.15) | 41 (0 to 68.68) | 94 (91.66 to 95.83) | ||
| Subjective | 2 | −24.99 (−30.06 to −19.92) | −19.43 (−26.61 to −12.25) | 2 | −6.90 (−26.00 to 12.37) | 0 (0 to 100) | 0 (0 to 100) | 27 (0 to 72.41) | ||
| Secondary outcomes | ||||||||||
| Wake after sleep onset (PSG) | 2 | −20 (−59 to 18) | −13 (−34 to 7.89) | 2 | −7.14 (−33.00 to 18.23) | 65 (0 to 91.96) | 63 (0 to 91.62) | 0 (0 to 99.98) | ||
| No of awakenings (PSG) | 2 | 1.24 (−6.34 to 3.89) | −0.94 (−12 to 9.99) | 2 | −0.47 (−5.12 to 4.17) | 94 (81.24 to 98.13) | 0 (0 to 99.98) | 0 (0 to 99.90) | ||
| No awakenings (subjective) | 2 | 2.88 (−7.15 to 1.39) | −1.05 (−4.86 to 2.76) | 2 | −1.77 (−4.61 to 1.07) | 0 (0 to 100) | 0 (0 to 99.95) | 0 (0 to 99.81) | ||
| Total sleep time (PSG) | 2 | 49.15 (−60 to 16) | 35.10 (−34 to 10) | 2 | 14.05 (−31.00 to 58.72) | 63 (0 to 91.45) | 61 (0 to 91.07) | 0 (0 to 99.68) | ||
| Sleep efficiency (PSG) | 1 | 4.27 (2.01 to 6.52) | 0 (−2.52 to 2.52) | 1 | 4.47 (2.08 to 6.86) | — | — | — | ||
| Total sleep time (subjective) | 0 | — | — | 0 | — | — | — | — | ||
| Sleep quality (subjective) | 0 | — | — | 0 | — | — | — | — | ||
| Wake after sleep onset (subjective) | 0 | — | — | 0 | — | — | — | — | ||
PSG=polysomnographic.
*No of comparisons.