Table 1.
Characteristics of the study population.
| Chinese population (%) a |
PC responses |
PHE responses |
|||||
|---|---|---|---|---|---|---|---|
| Respondents with eligible PC answers (n = 468,541) |
Respondents who failed on test re-test PC questions (n=169,890) b |
Other excluded respondents (n = 448,888) b |
Respondents with eligible PHE answers (n = 4,925) |
Respondents who failed on repeated PHE questions (n = 3,575) c |
Respondents who did not correctly identify repeated questions at end of PHE questions (n = 5,085) c |
||
| Age (years) | |||||||
| 18–29 | 13·8 | 112,007 (23·9%) | 58,544 (34·5%) | 207,413 (46·2%) | 1492 (30·3%) | 1785 (49·9%) | 1337 (26·3%) |
| 30–49 | 30·5 | 287,577 (61·4%) | 74,780 (44·1%) | 133,182 (29·7%) | 2807 (57·0%) | 969 (27·1%) | 2925 (57·5%) |
| 50–69 | 26·2 | 68,957 (14·7%) | 36,416 (21·4%) | 44,459 (9·9%) | 605 (12·3%) | 114 (3·2%) | 800 (15·7%) |
| ≥70 | 8·3 | 0 | 0 | 2822 (0·6%) | 20 (0·4%) | 12 (0·3%) | 23 (0·5%) |
| Sex | |||||||
| Men | 51·2 | 156,907 (33·5%) | 58,596 (34·5%) | 177,819 (39·6%) | 1325 (26·9%) | 2085 (58·3%) | 1569 (30·9%) |
| Women | 48·8 | 311,634 (66·6%) | 111,294 (65·5%) | 271,069 (60·4%) | 3600 (73·1%) | 1490 (41·7%) | 3516 (69·2%) |
| Education level | |||||||
| None | 3·6 | 0 | 2 (<1%) | 3,213 (0·7%) | 2 (<1%) | 57 (1·6%) | 2 (<1%) |
| Primary | 24·6 | 0 | 32 (<1%) | 46,022 (10·3%) | 26 (0·5%) | 142 (4·0%) | 29 (0·6%) |
| Secondary | 49·6 | 152,895 (32·6%) | 60,963 (35·9%) | 176,364 (39·3%) | 543 (11·0%) | 861 (24·1%) | 921 (18·1%) |
| Higher | 15·4 | 315,646 (67·4%) | 108,892(64·1%) | 223,289 (49·7%) | 4354 (88·4%) | 2515 (70·3%) | 4133 (81·3%) |
| Income level d | |||||||
| Low | NA | 157,593 (33·6%) | 68,082 (40·1%) | 196,867 (43·8%) | 1128 (22·9%) | 1022 (28·6%) | 1435 (28·2%) |
| Medium | 275,773 (58·9%) | 91,793 (54·0%) | 217,637 (48·5%) | 3211 (65·2%) | 2027 (56·7%) | 3188 (62·69%) | |
| High | 35,180 (7·5%) | 10,015 (5·9%) | 34,384 (7·7%) | 586 (11·9%) | 526 (14·7%) | 462 (9·1%) | |
| Profession Profession-Non-manual |
|||||||
| Non-manual | NA | 291,303 (62·2%) | 103,932 (61·2%) | 167,463 (37·3%) | 3315 (67·3%) | 1430 (40·0%) | 3297 (64·8%) |
| Manual | 89,349 (19·1%) | 33,025 (19·4%) | 107,526 (24·0%) | 768 (15·6%) | 1410 (39·4%) | 926 (18·2%) | |
| Others e | 87,889 (18·8%) | 32,933 (19·4%) | 173,899 (38·7%) | 842 (17·1%) | 735 (20·6%) | 826 (17·0%) | |
a: According to China Statistical Yearbook compiled by National Bureau of Statistics of China: http://www–stats–gov–cn.proxy.www.stats.gov.cn/tjsj/ndsj/2021/indexch.htm (2020 population).
b: These participants (n=169,890) failed on test re-test PC questions and other respondents didn't meet the rest of other quality control criteria (n=448,888), both of which would be excluded from the total sample in the first survey round.
c: These participants (n=3,575) failed on repeated PHE questions and these respondents (n=5,085) did not correctly identify the recalling questions at end of PHE question, both of them would be excluded from PHE respondents in the second survey round.
d: The income level is divided into 3 groups: high (>US$ 30,769), middle (US$ 7,692-30,769) and low (<US$ 7,692). We revised the annual household income from China won to US$ at the exchange rate of 6·5 RMB won to the US$.
e: Other occupation including housewife and student, soldier, out of work, retired, and other laborers.
NA: not available in China Statistical Yearbook; NR: not reported; GBD: Global Burden of Disease.