Table 1.
Incidence rate (IR/1000 PY) of herpes zoster by population group, age and sex
| Overall adults | Group with increased risks | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| N (%) | Cases | Person-years | IR (95% CI) | N (%) | Cases | Person-years | IR (95% CI) | ||
| Age groups | |||||||||
| 18–29 | 245,614 (31.07) | 3127 | 1,709,940.64 | 1.83 (1.77, 1.89) | 1242 (4.78) | 17 | 4365.89 | 3.89 (2.27, 6.23) | |
| 30–39 | 184,005 (23.28) | 3887 | 1,275,383.01 | 3.05 (2.95, 3.15) | 2746 (10.57) | 66 | 8580.62 | 7.69 (5.95, 9.79) | |
| 40–49 | 165,497 (20.94) | 5602 | 1,139,809.41 | 4.91 (4.79, 5.05) | 3983 (15.33) | 188 | 13,017.82 | 14.44 (12.45, 16.66) | |
| 50–59 | 103,604 (13.11) | 6088 | 702,687.18 | 8.66 (8.45, 8.88) | 5913 (22.76) | 316 | 17,641.55 | 17.91 (15.99, 20.00) | |
| 60–69 | 62,136 (7.86) | 5038 | 412,984.65 | 12.20 (11.86, 12.54) | 6772 (26.07) | 416 | 19,788.09 | 21.02 (19.05, 23.14) | |
| 70–79 | 20,800 (2.63) | 1691 | 132,771.62 | 12.74 (12.14, 13.36) | 3980 (15.32) | 181 | 10,001.43 | 18.10 (15.56, 20.93) | |
| 80– | 8754 (1.11) | 422 | 43,686.67 | 9.66 (8.76, 10.63) | 1344 (5.17) | 48 | 2967.43 | 16.18 (11.93, 21.45) | |
| Sex | |||||||||
| Male | 384,388 (48.63) | 12,254 | 2,633,532.87 | 4.65 (4.57, 4.74) | 13,431 (51.70) | 577 | 38,726.48 | 14.90 (13.71, 16.17) | |
| Female | 406,022 (51.37) | 13,601 | 2,783,730.28 | 4.89 (4.80, 4.97) | 12,549 (48.30) | 655 | 37,636.34 | 17.40 (16.10, 18.79) | |
| Overall | 790,410 (100.00) | 25,855 | 5,417,263.15 | 4.77 (4.71, 4.83) | 25,980 (3.29)a | 1232 | 76,362.82 | 16.13 (15.25, 17.06) | |
95% CIs were calculated using exact Poisson limits
N (%) are within column percentages
Person time for increased risk accrues from first qualifying diagnosis
CI confidence interval, IR incidence rate
aValues are reported as a percentage of the total population (n = 790410)