Table 2.

Genotype frequencies

	Bereaved (N = 36)		Non-bereaved (N = 28)		X2	P-value
	N	%	N	%
IL-6 –174GG (high)	19	53	13	46	0.25	0.61
IL-6 –174C carriers (low)	17	47	15	54
IL-6 –174GC	14	39	11	40
IL-6 –174CC	3	8	4	14
Allele frequency	0.72G, 0.28C		0.66G, 0.34C
IL-6 –572C carriers (high)	7	19	5	18	0.03	0.87
IL-6 –572GC	7	19	4	14
IL-6 –572CC	0	0	1	4
IL-6 –572GG (low)	29	81	23	82
Allele frequency	0.90G, 0.10C		0.89G,0.11
IL-1β –511AA (high)	10	28	4	14	1.68	0.2
IL-1β –511G carriers (low)	26	72	24	86
IL-1β –511AG	14	39	11	40
IL-1β –511GG	12	33	13	46
Allele frequency	0.47A, 0.53G		0.32A, 0.68G
TNF-α –308A carriers (high)	10	28	2	7	4.4	0.04
TNF-α –308GA	8	22	2	7
TNF-α –308AA	2	6	0	0
TNF-α –308GG (low)	26	72	26	93
Allele frequency	0.83G, 0.17A		0.96G, 0.04A

Genotype frequencies N (%), X² value (chi square test). Genotype frequency statistic based on comparison (shown in bold) of GG vs. C carriers for IL-6 –174 and –572, AA vs. G carriers for IL-1β –511; GG vs. A carriers for TNF-α –308.