Table 2. Subgroup analysis based on the characteristics of the included subjects.

Study characteristics	No. of studies	Acceptance rate (%) (95% CI)	I2	p-value
Survey year
2020	9	73(65–81)	99.19%	<0.001
2021	8	82(78–86)	98.17%	<0.001
gender
male	16	83(78–88)	97.37%	<0.001
female	16	80(74–85)	99.19%	<0.001
age(year)
<30	11	81(75–86)	97.92%	<0.001
30–39	8	73(60–85)	99.17%	<0.001
40–49	8	81(69–90)	98.38%	<0.001
≥50	11	86(76–93)	96.68%	<0.001
Education Level
College degree or below	11	84(79–89)	97.54%	<0.001
Bachelor degree	11	82(78–86)	98.25%	<0.001
Postgraduate and above	11	79(72–86)	95.46%	<0.001
Occupation
doctors	9	85(79–90)	96.96%	<0.001
Nurses	10	76(68–83)	99.24%	<0.001
others	10	84(82–87)	70.57%	<0.001
Monthly income(yuan)
≤5000	5	85(75–94)	97.60%	<0.001
5001–1000	5	84(73–92)	98.43%	<0.001
>10000	4	78(55–94)	98.79%	<0.001
region
Eastern	6	82(69–92)	99.31%	<0.001
Southern	4	87(84–90)	89.10%	<0.001
Western	7	80(68–90)	99.20%	<0.001
Northern	2	79(77–80)	0%	<0.001
Professional position
Junior or no	6	83(78–88)	98.63%	<0.001
Middle	6	83(77–89)	97.57%	<0.001
Senior	6	85(78–91)	94.62%	<0.001
Marital status
Married	5	87(82–91)	95.33%	<0.001
Unmarried	5	87(80–93)	94.54%	<0.001
Others (Widowed or divorced)	4	70(38–95)	89.02%	<0.001
Having chronic conditions
Yes	5	75(57–90)	98.06%	<0.001
No	5	80(64–93)	99.68%	<0.001
Time of employment(year)
≤5	5	83(78–87)	88.94%	<0.001
6–10	5	85(80–89)	88.36%	<0.001
11–20	4	85(79–89)	85.71%	<0.001
>20	4	83(79–87)	77.17%	<0.001
Participated in quarantine or had contact with confirmed cases
Yes	8	83(75–90)	98.82%	<0.001
No	8	78(69–86)	99.31%	<0.001