Table 1.

Distribution of cases and controls by stratification variable and socioeconomic category (LM: lymphoid malignancy; NHL: non-Hodgkin’s lymphoma; HL: Hodgkin’s lymphoma; LPS: lymphoproliferative syndrome; MM: multiple myeloma) – ORs were estimated by unconditional logistic regression adjusted for stratification variables.

	All LM				NHL				HL				LPS				MM
	Cases n=813	Controls n=748	Co/Ca	p	Cases n=395	Controls n=698	Co/Ca	P	Cases n=147	Controls n=415	Co/Ca	p	Cases n=168	Controls n=464	Co/Ca	p	Cases n=103	Controls n=476	Co/Ca	p
Gender				ns				ns				ns				ns				**
Female	41%	39%	0.9		39%	38%	1.7		42%	36%	2.4		38%	34%	2.5		50%	35%	3.2
Male	59%	61%	0.9		61%	62%	1.8		58%	64%	3.1		62%	66%	2.9		50%	65%	6.0
Center				ns				*				ns				***				ns
Brest	19%	19%	0.9		22%	20%	1.6		15%	18%	3.3		13%	24%	5.0		20%	23%	5.1
Caen	14%	14%	0.9		6%	12%	3.4		11%	12%	3.2		38%	19%	1.4		10%	11%	5.4
Nantes	19%	18%	0.9		19%	17%	1.5		27%	26%	2.7		16%	15%	2.7		12%	12%	4.8
Lille	10%	10%	1.0		8%	9%	2.2		3%	2%	1.6		18%	14%	2.0		14%	11%	3.6
Toulouse	17%	18%	1.0		19%	19%	1.8		22%	21%	2.8		5%	12%	6.0		19%	19%	4.6
Bordeaux	21%	21%	0.9		26%	23%	1.5		22%	21%	2.8		10%	16%	4.7		25%	24%	4.5
Age				ns				ns				***				ns				ns
< 30 y	9%	10%	1.0		5%	7%	2.6		37%	17%	1.3		-	-	-		-	-	-
30–39 y	9%	10%	0.9		10%	10%	1.8		21%	15%	2.0		3%	4%	3.8		3%	3%	4.3
40–49 y	17%	17%	0.9		18%	17%	1.7		22%	22%	2.8		13%	14%	2.9		10%	12%	5.5
50–59 y	29%	29%	0.9		34%	30%	1.6		10%	27%	8.0		34%	32%	2.6		32%	39%	5.6
60–69 y	26%	25%	0.9		23%	25%	2.0		10%	18%	5.0		36%	36%	2.8		43%	34%	3.7
≥ 70y	10%	10%	1.0		11%	10%	1.6		1%	1%	6.0		14%	14%	2.9		13%	12%	4.5
	Cases	Controls	OR [95%CI]		Cases	Controls	OR [95%CI]		Cases	Controls	OR [95%CI]		Cases	Controls	OR [95%CI]		Cases	Controls	OR [95%CI]
Socioeconomic category				**				ns				*				ns				ns
Scientific/administrative manager	23%	20%	1.1	[0.8–1.5]	22%	20%	1.1	[0.7–1.6]	25%	19%	1.4	[0.8–2.4]	23%	21%	1.1	[0.7–1.9]	23%	21%	1.2	[0.6–2.4]
Administrative, sales, service worker	26%	25%	1.0	ref.	25%	24%	1.0	ref.	30%	24%	1.0	ref.	27%	24%	1.0	ref.	24%	23%	1.0	Ref.
Factory worker	37%	44%	0.8	[0.6–1.0]	39%	45%	0.9	[0.6–1.2]	26%	45%	0.5	[0.3–0.9]	40%	45%	0.8	[0.5–1.2]	36%	45%	0.9	[0.5–1.6]
Agricultural worker	10%	6%	1.5	[1.0–2.2]	11%	7%	1.6	[1.0–2.7]	5%	6%	1.0	[0.4–2.6]	9%	8%	1.2	[0.6–1.4]	14%	8%	2.2	[1.0–5.0]
Unemployed	4%	5%			3%	4%			14%	6%			1%	2%			3%	3%
Education				#				ns				#				ns				ns
Less than secondary level	65%	68%	1.0	Ref.	67%	69%	1.0	ref.	44%	62%	1.0	ref.	75%	75%	1.0	ref.	70%	73%	1.0	ref.
Secondary level	35%	32%	1.2	[1.0–1.5]	33%	31%	1.1	[0.8–1.4]	56%	38%	1.5	[1.0–2.3]	25%	25%	1.2	[0.8–1.9]	30%	27%	1.2	[0.7–2.0]

^#p<0.10;

^*p<0.05;

^**p<0.01;

^***p<0.001; ns: p>0.10