Table 2

Number of subjects by age at first occurrence of infectious diseases^2-150 among population controls (n=1718) and among cases affected by non-Hodgkin's lymphomas (NHL) (n=1388) or Hodgkin's disease (HD) (n=354), according to sibship size (not including the index subject). 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

Sibship size		Age at first infection
		Controls				NHL			HD
		<4	4–8			9+	<4		4–8	9+	<4	4–8	9+
0	28	57	39		13	55	38	13	15	8
1	66	166	106		24	126	94	19	45	26
2–3	52	253	170		40	159	122	21	55	28
4+	42	220	189		35	141	181	9	28	24
Totals	188	696	504		112	481	435	62	143	86
Age unknown	240 (14%)			259 (19%)			41 (12%)
Information not available	90 (5%)			101 (7%)			22 (6%)

↵2-150 List of diseases in the text.