04 May 2015 : Meta-Analysis
Meta-Analysis of Self-Reported Daytime Napping and Risk of Cardiovascular or All-Cause Mortality
Xiaokun Liu BCF , Qi Zhang BEF , Xiaoming Shang ABCDDOI: 10.12659/MSM.893186
Med Sci Monit 2015; 21:1269-1275
Supplemental Table 2 Subgroup analyses of self-reported daytime napping and risk of all-cause mortality.
| Group | Number of studies | Event/total number | Pooled risk ratio | 95% CI |
|---|---|---|---|---|
| Region | ||||
| Asia | 2 | 10,981/70,208 | 1.12 | 1.01–1.26 |
| No Asia | 5 | 4,616/27,955 | 1.19 | 1.05–1.34 |
| Follow-up duration | ||||
| ≤11 years | 3 | 3,665/13,039 | 1.08 | 0.89–1.32 |
| >11 years | 4 | 12,746/85,124 | 1.16 | 1.08–1.25 |
| Sample size | ||||
| 4 | 3,812/6,559 | 1.05 | 0.89–1.24 | |
| >5000 | 3 | 12,599/91,604 | 1.19 | 1.14–1.26 |
| Nap duration | ||||
| 3 | 2,777/21,312 | 1.10 | 0.92–1.32 | |
| >60 min | 3 | 2,777/21,312 | 1.15 | 1.04–1.27 |
| Gender | ||||
| Men | 3 | 6,676/30,347 | 1.15 | 1.09–1.21 |
| Women | 4 | 6,632/49,821 | 1.15 | 0.92–1.43 |