Table 4.

Differences in general intelligence g between sexes for all data sets: the Indian sample (MPC), Scottish (ACONF) and UK Biobank.

Cohorts	Age at cognitive testing (years)	General intelligence g: males, mean ± sd	General intelligence g: females, mean ± sd	General intelligence g: Males (min; max)	General intelligence g: females (min; max)	t	p
MPC	20–22	98.62 ± 14.52	101.48 ± 15.45	64.40; 131.18	64.07; 136.85	t(164) =  − 1.23	.220
ACONF	11	98.76 ± 15.59	101.18 ± 14.38	59.35; 128.91	66.97; 131.37	t(236) =  − 1.25	.213
ACONF	60–66	98.10 ± 14.84	101.81 ± 14.98	57.48; 133.47	65.78; 132.72	t(236) =  − 1.91	.057
UKBiobank	60–66	102.27 ± 16.39	99.40 ± 15.75	47.32; 141.98	56.95; 142.64	t(1967) =  − 3.96	< .001
UKBiobank	45–79	101.09 ± 16.77	99.02 ± 15.87	47.32; 142.53	51.24; 143.17	t(6657) =  − 5.17	< .001