Table 3 Contact characteristics associated with differences between contact rates within age groups, South Africa, 2018
Risk ratio (95% confidence interval) | ||||||
|---|---|---|---|---|---|---|
All ages | < 7 years | 7–13 years | 14–18 years | 19–64 years | ≥65 years | |
Type of contact | ||||||
Physical | 1.2 (1.1 to 1.2) | 1.5 (1.4 to 1.6) | 1.0 (0.9 to 1.0) | 0.8 (0.7 to 0.9) | 0.9 (0.9 to 1.0) | 0.3 (0.2 to 0.4) |
Non-physical | Reference | |||||
Age of contact | ||||||
< 7 years | 6.1 (5.5 to 6.8) | 8.2 (5.8 to 11.6) | 0.6 (0.4 to 0.8) | 0.5 (0.3 to 0.8) | 0.3 (0.2 to 0.3) | 0.3 (0.1 to 0.7) |
7–13 years | 8.5 (7.7 to 9.5) | 2.9 (2.0 to 4.1) | 3.5 (2.7 to 4.4) | 0.4 (0.2 to 0.6) | 0.2 (0.2 to 0.2) | 0.4 (0.2 to 1.0) |
14–18 years | 6.7 (6.0 to 7.5) | 0.6 (0.4 to 0.8) | 1.8 (1.4 to 2.4) | 6.3 (4.4 to 9.1) | 0.2 (0.2 to 0.3) | 0.2 (0.1 to 0.5) |
19–64 years | 11.9 (10.7 to 13.2) | 1.2 (0.8 to 1.7) | 0.9 (0.7 to 1.1) | 1.9 (1.3 to 2.8) | 0.9 (0.8 to 1.0) | 1.3 (0.6 to 2.9) |
≥65 years | Reference | |||||
Gender of contact | ||||||
Male | Reference | |||||
Female | 1.2 (1.1 to 1.2) | 1.0 (0.9 to 1.1) | 0.8 (0.8 to 0.9) | 1.0 (0.9 to 1.1) | 1.2 (1.1 to 1.3) | 1.1 (0.8 to 1.5) |
Not reported | 0.1 (0.1 to 0.1) | 1.4 (1.2 to 1.7) | 0.4 (0.3 to 0.5) | 1.2 (0.9 to 1.5) | 1.3 (1.1 to 1.6) | NEO |
Contact is household member | ||||||
No | 3.9 (3.7 to 4.0) | 0.9 (0.8 to 1.0) | 1.3 (1.2 to 1.4) | 1.2 (1.1 to 1.4) | 0.8 (0.8 to 0.9) | 0.4 (0.3 to 0.5) |
Yes | Reference | |||||
Total time spent with contact during the day | ||||||
< 5 m | Reference | |||||
5-15 m | 2.5 (2.2 to 2.9) | 1.3 (0.8 to 2.1) | 1.4 (1.0 to 2.1) | 0.8 (0.6 to 1.1) | 0.9 (0.8 to 1.1) | 0.6 (0.2 to 1.8) |
15 m-1 h | 8.7 (7.7 to 9.9) | 2.0 (1.3 to 3.1) | 1.6 (1.1 to 2.2) | 0.8 (0.6 to 1.1) | 0.8 (0.7 to 0.9) | 0.8 (0.3 to 2.2) |
1-4hts | 16.8 (14.8 to 19.1) | 2.9 (1.9 to 4.5) | 2.5 (1.8 to 3.5) | 0.6 (0.5 to 0.8) | 0.5 (0.4 to 0.6) | 0.7 (0.3 to 1.7) |
> 4 h | 22.1 (19.5 to 25.0) | 2.9 (1.9 to 4.4) | 2.3 (1.6 to 3.2) | 1.0 (0.7 to 1.3) | 0.4 (0.4 to 0.5) | 0.5 (0.2 to 1.3) |
Frequency of contact | ||||||
Daily/almost daily | 34.6 (30.8 to 38.8) | 16.1 (6.7 to 38.7) | 8.9 (4.9 to 16.1) | 1.4 (1.0 to 2.0) | 0.3 (0.2 to 0.3) | 0.8 (0.3 to 2.7) |
Once or twice a week | 5.7 (5.1 to 6.5) | 5.5 (2.2 to 13.3) | 4.4 (2.4 to 8.1) | 1.3 (0.9 to 1.9) | 0.7 (0.6 to 0.8) | 2.4 (0.8 to 7.9) |
Once or twice a month | Reference | |||||
< 1 a month | 0.7 (0.6 to 0.9) | 0.8 (0.2 to 3.5) | 0.4 (0.1 to 1.3) | No observations | 1.2 (1.0 to 1.4) | 0.5 (0.0 to 4.4) |
Never met before | 1.8 (1.6 to 2.1) | 3.9 (1.5 to 10.0) | 4.5 (2.4 to 8.4) | 0.5 (0.3 to 0.8) | 0.8 (0.7 to 0.9) | 5.8 (1.8 to 18.9) |
Location of contact | ||||||
Home | 3.6 (3.3 to 3.9) | 1.2 (1.0 to 1.5) | 2.1 (1.6 to 2.8) | 1.1 (0.8 to 1.5) | 0.8 (0.7 to 0.9) | 0.3 (0.2 to 0.4) |
School | 8.2 (7.7 to 8.8) | 1.5 (1.2 to 1.8) | 3.7 (2.8 to 4.9) | 2.6 (2.0 to 3.5) | 0.1 (0.1 to 0.1) | No observations |
Work | 0.8 (0.7 to 0.8) | No observations | 0.0 (0.0 to 0.1) | 0.0 (0.0 to 0.1) | 2.0 (1.7 to 2.3) | 0.0 (0.0 to 0.1) |
Transport | Reference | |||||
Other | 5.1 (4.7 to 5.5) | 0.8 (0.6 to 1.0) | 2.2 (1.7 to 2.9) | 1.2 (0.9 to 1.7) | 0.9 (0.8 to 1.1) | 0.1 (0.1 to 0.1) |