Table 2 Demographic variation in HSV‐1 seroprevalence in Australia.
| HSV‐1 | No | Rate (%) and 95% CI | Univariate RR | Multivariate RR* | |
|---|---|---|---|---|---|
| Weighted† | |||||
| Age | χ2(5) = 14.8 p = 0.011 | χ2(5) = 16.0 p = 0.007 | |||
| 25–34 | 124 | 68.5 (60.3 to 76.7) | 67.0 (58.7 to 75.3) | 1.00 | 1.00 |
| 35–44 | 233 | 77.3 (71.9 to 82.7) | 75.1 (69.6 to 80.7) | 1.13 (0.98 to 1.29) | 1.12 (1.00 to 1.26) |
| 45–54 | 232 | 81.0 (76.0 to 86.1) | 80.1 (75.0 to 85.2) | 1.18 (1.03 to 1.35) | 1.19 (1.06 to 1.34) |
| 55–64 | 176 | 75.6 (69.3 to 82.0) | 75.5 (69.2 to 81.9) | 1.10 (0.95 to 1.27) | 1.11 (0.98 to 1.25) |
| 65–74 | 170 | 85.9 (80.7 to 91.1) | 85.2 (79.9 to 90.5) | 1.25 (1.09 to 1.44) | 1.25 (1.11 to 1.41) |
| ⩾75 | 65 | 75.4 (64.9 to 85.9) | 76.6 (66.3 to 86.9) | 1.10 (1.10 to 1.33) | 1.09 (0.93 to 1.28) |
| Sex | χ2(1) = 11.2 p = 0.001 | χ2(1) = 11.4 p = 0.001 | |||
| Male | 516 | 71.3 (67.4 to 75.2) | 71.3 (67.4 to 75.2) | 1.00 | 1.00 |
| Female | 480 | 80.4 (76.9 to 84.0) | 80.4 (76.9 to 84.0) | 1.13 (1.05 to 1.21) | 1.12 (1.05 to 1.19) |
| Geography | χ2(2) = 4.2 p = 0.122 | χ2(2) = 3.9 p = 0.141 | |||
| Capital city | 536 | 75.7 (72.1 to 79.3) | 73.6 (69.9 to 77.3) | 1.00 | 1.00 |
| Other metropolitan | 193 | 82.4 (77.0 to 87.8) | 78.9 (73.1 to 84.7) | 1.09 (0.98 to 1.20) | 1.08 (1.00 to 1.18) |
| Rural and remote | 271 | 79.7 (74.9 to 84.5) | 78.6 (73.7 to 83.5) | 1.05 (0.96 to 1.15) | 1.04 (0.97 to 1.12) |
| Indigenous status | χ2(1) = 5.7 p = 0.017 | χ2(1) = 5.4 p = 0.020 | |||
| Non‐Indigenous | 972 | 77.6 (75.0 to 80.2) | 75.4 (72.7 to 78.1) | 1.00 | 1.00 |
| Indigenous | 28 | 96.4 (81.7 to 99.9)¶ | 100.0 (87.7 to 100.0)‡¶ | 1.24 (1.01 to 1.53) | 1.24 (1.04 to 1.47) |
| Australia | 1000 | 78.1 (75.5 to 80.1) | 75.7 (73.0 to 78.4) | ||
95% confidence interval (CI) of rates calculated by the normal approximation of the binomial except for those indicated. CIs for weighted rates are based on weighted proportions but actual n (given in the table). 95% CI of rates calculated by the normal approximation of the binomial. Relative risk (RR) calculated from a Poisson regression analysis. 95% CIs of RR calculated from the Wald method using SAS.
*Age group, sex, geography, Indigenous status.
†Weighted to the age, sex, geographic, and Indigenous structure of the 2001 Australian census population.
‡One sided test. ¶Exact binomial.
χ2(x), chi square at x degrees of freedom.