Table 2.
Incidence of anal fissure (cases/1000 person-years) stratified by age group and sex
| Age group | Pooled incidence | P † | Male incidence | Female incidence | P †† |
|---|---|---|---|---|---|
|
6-11 |
0.49 |
*** |
0.44 |
0.54 |
|
|
12-17 |
0.52 |
*** |
0.24 |
0.80 |
*** |
|
18-24 |
1.47 |
|
0.96 |
1.78 |
*** |
|
25-34 |
1.76 |
|
1.76 |
1.76 |
|
|
35-44 |
1.46 |
|
1.62 |
1.34 |
|
|
45-54 |
1.25 |
** |
1.29 |
1.22 |
|
|
55-64 |
1.31 |
* |
1.51 |
1.13 |
*** |
|
65+ |
1.01 |
*** |
1.17 |
0.88 |
|
| Total | 1.10 | 1.04 | 1.14 |
† Difference between 25–34 group and starred age groups significant at: *P < 0.01; **P < 0.001; ***P < 0.0001.
†† Difference between sexes within this age group significant at: ***P < 0.0001.