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Mean age of patients with perforated duodenal ulcer
| Period | Male patients age, years (SD) | Female patients age, years (SD) |
|---|---|---|
| I (1962–1976) | 44.5 (16.4)a | 55.04 (13.98)d |
| II (1977–1991) | 45.8 (17.1)b | 57.7 (20.7)e |
| III (1992–2006) | 47.2 (16.2)c | 60.6 (18.97)f |
| I + II + III | 45.85 (16.6) | 58.89 (18.8) |
a/d, b/e, c/f and for whole study group differences with statistical significance (P < 0.001)
