Table 3.
Spatial Distribution of the Contact Characteristics across the Different Cities.
| Category | Covariate | Frequency in Foshan (%) | Frequency in Guangzhou (%) | Frequency in Zhuhai (%) | P-value |
|---|---|---|---|---|---|
| Relationships | Relative | 6,621(57.2) | 8,356(42.1) | 2,263(55.1) | <0.001 |
| Colleague/Schoolmate | 2,669(23.1) | 5,453(27.5) | 1,243(30.3) | ||
| Friend | 2,002(17.3) | 3,842(19.3) | 465(11.3) | ||
| Others | 283(2.4) | 2,207(11.1) | 138(3.4) | ||
| Location | Home | 6,679(57.7) | 8,057(40.6) | 2,271(55.3) | <0.001 |
| School | 874(7.6) | 2,045(10.3) | 403(9.8) | ||
| Office | 1,689(14.6) | 3,611(18.2) | 890(21.7) | ||
| Transport | 117(1.0) | 406(2.0) | 9(0.2) | ||
| Leisure | 1,783(15.4) | 4,660(23.5) | 398(9.7) | ||
| Others | 561(4.8) | 1,545(7.8) | 157(3.8) | ||
| Frequency | (Almost) daily | 7,292(63.0) | 13,859(69.8) | 3,289(80.0) | <0.001 |
| Once-twice/week | 2,668(23.0) | 4,013(20.2) | 588(14.3) | ||
| Once-twice/month | 1,244(10.7) | 1,264(6.4) | 204(5.0) | ||
| Monthly | 325(2.8) | 398(2.0) | 14(0.3) | ||
| First time | 46(0.4) | 324(1.6) | 14(0.3) | ||
| Duration | <5 min | 161(1.4) | 1,097(5.5) | 40(1.0) | <0.001 |
| 5–15 min | 362(3.1) | 1,419(7.1) | 126(3.1) | ||
| 15 min–1 hr | 1,214(10.5) | 2,912(14.7) | 425(10.3) | ||
| 1–4 hr | 2,648(22.9) | 5,174(26.1) | 505(12.3) | ||
| >4 hr | 7,190(62.1) | 9,256(46.6) | 3,013(73.3) | ||
| Nature of contacts | physical | 7,387(63.8) | 7,706(38.8) | 3,123(76.0) | <0.001 |
| non-physical | 4,188(36.2) | 12,152(61.2) | 986(24.0) |
Abbreviations: hr, hours; min, minutes.