Table 1.
Baseline demographic information. All participants were enrolled in the 6-month study between March and October 2019
| All participants, N = 1506 | Wave 1 group, N = 726 | Wave 2 group, N = 780 | p-values | |
|---|---|---|---|---|
| Baseline characteristics | ||||
| Age group, N (%) | 0.008 | |||
| 18–39 | 897 (59.6) | 408 (56.2) | 489 (62.7) | |
| 40–59 | 540 (35.9) | 275 (37.9) | 265 (34.0) | |
| ⩾60 | 69 (4.6) | 43 (5.9) | 26 (3.3) | |
| Gender, N (%) | 0.089 | |||
| Male | 560 (37.2) | 254 (35.0) | 306 (39.2) | |
| Female | 946 (62.8) | 472 (65.0) | 474 (60.8) | |
| Education, N (%) | 0.900 | |||
| Below undergraduate | 442 (61.7) | 451 (62.1) | 487 (62.4) | |
| Undergraduate and above | 274 (38.3) | 275 (37.5) | 293 (37.6) | |
| Occupation, N (%) | 0.055 | |||
| Unemployed | 133 (18.9) | 162 (22.3) | 143 (18.3) | |
| Employed | 583 (81.4) | 564 (77.7) | 637 (81.7) | |
| Marital status, N (%) | 0.025 | |||
| Unmarried | 370 (24.6) | 156 (21.5) | 214 (27.4) | |
| Married | 1085 (72.0) | 546 (75.2) | 539 (69.1) | |
| Divorced or widowed | 51 (3.4) | 24 (3.3) | 27 (3.5) | |
| Birth place, N (%) | 0.204 | |||
| Hubei | 159 (10.6) | 79 (10.9) | 80 (10.3) | |
| Local | 121 (8.0) | 49 (6.7) | 72 (9.2) | |
| Non-local | 1226 (81.4) | 598 (82.4) | 628 (80.5) | |
| Years lived in Shenzhen, N (%) | 0.709 | |||
| 5 years and below | 440 (29.2) | 205 (28.2) | 235 (30.1) | |
| 5–10 years | 251 (16.7) | 124 (17.1) | 127 (16.3) | |
| 10 years and above | 815 (54.1) | 397 (54.7) | 418 (53.6) | |
| Living status, N (%) | 0.292 | |||
| Single | 154 (10.2) | 75 (10.3) | 79 (10.1) | |
| With relatives | 1174(78.0) | 575 (79.2) | 599 (76.8) | |
| With non-relatives | 178 (11.8) | 76 (10.5) | 102 (13.1) | |
| Health status and behaviours | ||||
| Chronic diseases, N (%) | <0.001 | |||
| No | 521 (72.8) | 579 (79.8) | 540 (69.2) | |
| Yes | 195 (27.2) | 147 (20.2) | 240 (30.8) | |
| Insomnia drug, N (%) | 0.901 | |||
| No | 646 (90.2) | 652 (89.8) | 702 (90.0) | |
| Yes | 70 (9.8) | 74 (10.2) | 78 (10.0) | |
| Referral and see psychologist, N (%) | 0.586 | |||
| No | 1306 (86.7) | 626 (86.2) | 680 (87.2) | |
| Yes | 200 (13.3) | 100 (13.8) | 100 (12.8) | |
| Exercise habit per week (at least 1 time and ⩾30 min), N (%) | 0.031 | |||
| No | 854 (56.7) | 391 (53.9) | 463 (59.4) | |
| Yes | 652 (43.3) | 335 (46.1) | 317 (40.6) | |
| Frequency for smoke in a month, N (%) | 0.021 | |||
| 2 days and below | 1322 (87.8) | 652 (89.8) | 670 (85.9) | |
| 3 days and above | 184 (12.2) | 74 (10.2) | 110 (14.1) | |
| Frequency for alcohol consumption in a month, N (%) | 0.728 | |||
| 2 days and below | 1254 (83.3) | 692 (82.9) | 652 (83.6) | |
| 3 days and above | 252 (16.7) | 124 (17.1) | 128 (16.4) | |
| Body-mass index, N (%) | 0.525 | |||
| Normal (18.5–23.9) | 945 (62.7) | 463 (63.8) | 482 (61.8) | |
| Underweight | 153 (10.2) | 76 (10.5) | 77 (9.9) | |
| Overweight | 408 (27.1) | 187 (25.8) | 221 (28.3) | |
Abbreviation: wave 1: participants completed the baseline and 6-month follow-up before the COVID-19 outbreak (i.e. from March 2019 to January 2020); wave 2: participants completed the baseline before COVID-19 outbreak but 6-month follow-up during the COVID-19 outbreak (i.e. from August 2019 to April 2020).