Table 4.

Risk of mortality by age 70, stratified by sex, IQ group, and educational attainment reported in 1975. Includes only the participants that responded to the 1975 questionnaire (4,567 men and 5,043 women).

		High School			Some College			College Degree or More
IQ Category	Total N participating in 1975	N	% of IQ Group	% died by age 70	N	% of IQ Group	% died by age 70	N	% of IQ Group	% died by age 70
Men
61-70	97	93	95.9	19.4	4	4.1	25.0	0	0.0	a
71-85	562	479	85.2	19.0	51	9.1	19.6	32	5.7	9.4
86-100	1531	1089	71.1	18.0	207	13.5	11.6	235	15.3	19.6
101-115	1604	759	47.3	22.3	274	17.1	18.6	571	35.6	11.6
116-130	659	143	21.7	22.7	113	17.1	16.8	403	61.2	14.4
131-145	114	6	5.3	50.0	12	10.5	16.7	96	84.2	9.4
chi-square p- value				0.10			0.40			0.02*
Women
61-70	73	69	94.5	21.7	2	2.7	50.0	2	2.7	50.0
71-85	658	590	89.7	12.9	49	7.4	12.2	19	2.9	10.5
86-100	1764	1435	81.3	14.6	197	11.2	13.7	132	7.5	8.3
101-115	1778	1115	62.7	12.7	274	15.4	10.9	389	21.9	8.2
116-130	671	282	42.0	14.1	117	17.4	17.1	272	40.5	8.5
131-145	99	26	26.3	7.7	12	12.1	16.7	61	61.6	9.8
chi-square p- value				0.24			0.38			0.46

Note:

^aBecause there were no men with IQ scores 61-70 who graduated college, the chi-square statistic includes the other 5 IQ categories.