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Age distribution of patients with IC in cohort (prevalent and incident cases)
| Age (years) | Number | Percent (%) | Cumulative frequency | Cumulative percent (%) |
|---|---|---|---|---|
| 21–30 | 3 | 3.37 | 3 | 3.37 |
| 31–40 | 4 | 4.49 | 7 | 7.87 |
| 41–50 | 11 | 12.36 | 18 | 20.22 |
| 51–65 | 29 | 32.58 | 47 | 52.81 |
| >65 | 42 | 47.19 | 89 | 100.00 |
