Table 4.

Pooled prevalence of complete ADL and subgroup analyses.

Variables	Classification	Number of Studies	Number of Results	Event Rate (%)	95% CI (%)	Heterogeneity I2 (%)	Q-Value	p-Value
Pooled prevalence		41	41	33.8	29.4–38.3	99.6	10,997.47
Gender	Male	16	16	32.2	23.1–41.4	99.5	0.52	0.472
	Female	16	16	36.7	28.7–44.7	99.4
Age group	60–69	6	6	25.5	14.0–36.9	99.7	22.45	<0.001
	70–79	6	6	40.5	24.9–56.1	99.6
	≥80	7	7	61.9	51.9–71.9	97.3
Region	Eastern China	16	16	36.4	27.8–44.9	99.8	1.10	0.578
	Northern China	12	12	34.7	26.9–42.4	99.6
	Other regions *	12	12	31.2	25.1–37.2	99.6
Survey year	2009 and before *	10	10	32.9	24.4–41.5	99.5	0.38	0.827
	2010–2014	15	15	35.9	27.4–44.3	99.7
	2015–2019	16	16	32.5	24.9–40.1	99.7

* To avoid the limitation of insufficient studies, we merged Central China, Southwest China, and Northwest China into a group called “Other regions”. In addition, the studies published in 2009 and prior to 2009 were merged into one group.