Table 2

Total, direct and indirect effects from childhood SEP to mid-life cognitive function

Effect	Cohort										β	SE	95 % CI
Total	NSHD										0.470	0.027	0.411 to 0.528
	NCDS										0.341	0.013	0.313 to 0.371
	BCS										0.341	0.015	0.311 to 0.374
Direct	NSHD										0.056	0.038	−0.033 to 0.126
	NCDS										−0.005	0.017	−0.047 to 0.028
	BCS										−0.008	0.021	−0.050 to 0.034
Total indirect	NSHD										0.413	0.028	0.364 to 0.487
	NCDS										0.346	0.010	0.324 to 0.369
	BCS										0.349	0.012	0.323 to 0.376
Specific indirect	NSHD	SEP	→	g10	→	Education	→	Occupation	→	g50	0.014	0.006	0.001 to 0.026
	NCDS										0.006	0.002	0.002 to 0.010
	BCS										0.006	0.001	0.003 to 0.009
	NSHD	SEP	→	g10	→	Occupation	→	g50			0.009	0.004	0.002 to 0.020
	NCDS										0.005	0.001	0.002 to 0.008
	BCS										0.006	0.001	0.003 to 0.090
	NSHD	SEP	→	Education	→	Occupation	→	g50			0.010	0.004	0.001 to 0.018
	NCDS										0.005	0.001	0.001 to 0.008
	BCS										0.006	0.002	0.003 to 0.010
	NSHD	SEP	→	g10	→	Education	→	g50			0.001	0.018	−0.038 to 0.036
	NCDS										0.038	0.006	0.027 to 0.050
	BCS										0.025	0.004	0.017 to 0.035
	NSHD	SEP	→	g10	→	g50					0.374	0.032	0.318 to 0.461
	NCDS										0.257	0.010	0.239 to 0.281
	BCS										0.273	0.012	0.249 to 0.301
	NSHD	SEP	→	Education	→	g50					0.001	0.013	−0.025 to 0.029
	NCDS										0.029	0.005	0.021 to 0.040
	BCS										0.028	0.005	0.018 to 0.038
	NSHD	SEP	→	Occupation	→	g50					0.006	0.004	−0.001 to 0.017
	NCDS										0.005	0.002	0.002 to 0.008
	BCS										0.005	0.002	0.002 to 0.009

BCS, British Cohort Study; NCDS, National Child Development Study; NSHD, National Survey of Health and Development; SEP, socioeconomic position.