Age at first occurrence of infectious diseases5-150 among population controls (n=1718) and cases affected by Hodgkin's lymphomas (n=354), according to sibship size (excluding the index subject) and by education (years of school). All infections in the five years preceding the diagnosis of lymphoma or the interview of controls have been excluded. Age unknown at first infection excluded. Gender and age adjusted odds ratios, and 95% confidence intervals in parentheses
| Sibship size | Age at first occurrence | ||
|---|---|---|---|
| <4 | 4–8 | 9+ | |
| 0–1 | 1.0 | 1.0 (0.57, 1.67) | 1.17 (0.62, 2.23) |
| 2–3 | 1.0 | 0.44 (0.22, 0.87) | 0.60 (0.29, 1.24) |
| 4+ | 1.0 | 0.64 (0.26, 1.54) | 0.66 (0.26, 1.68) |
| Education (years of school) | |||
| <9 | 1.0 | 0.57 (0.31, 1.04) | 0.73 (0.39, 1.37) |
| 9–14 | 1.0 | 0.84 (0.48, 1.48) | 0.89 (0.45, 1.75) |
| 15+ | 1.0 | 0.84 (0.37, 1.95) | 0.96 (0.30, 3.10) |
↵5-150 The list of diseases is in the text.