Table 1

ORs and 95% CIs from multivariable logistic regression models of upward and downward social mobility in the 1958 and 1970 cohorts

	1958 cohort		1970 cohort
	OR	95% CI	OR	95% CI
Upward mobility
Breast fed	1.24	1.12 to 1.38	1.24	1.12 to 1.37
Female	0.65	0.50 to 0.84	0.80	0.62 to 1.03
RGSC in childhood*
I/II	(excluded)†		(excluded)†
IIINM	1.00		1.00
IIIM	1.04	0.85 to 1.28	1.06	0.88 to 1.27
IV/V	2.84	2.29 to 3.54	3.26	2.56 to 4.11
Gender by RGSC interaction
Female* I/II	(excluded)†		(excluded)†
Female* IIINM	1.00		1.00
Female* IIIM	2.53	1.92 to 3.34	1.98	1.52 to 2.58
Female* IV/V	1.15	0.85 to 1.56	1.03	0.71 to 1.49
N‡	12 429–12 548		11 773–11 900
Downward mobility
Breast fed	0.81	0.73 to 0.90	0.79	0.71 to 0.88
Female	1.40	1.22 to 1.60	1.13	0.95 to 1.33
RGSC in childhood§
I/II	2.49	2.13 to 2.93	2.99	2.54 to 3.54
IIINM	2.08	1.66 to 2.60	2.26	1.79 to 2.85
IIIM	1.00		1.00
IV/V	(excluded)¶		(excluded)¶
Gender by RGSC interaction
Female* I/II	1.12	0.92 to 1.37	1.09	0.88 to 1.35
Female* IIINM	0.54	0.40 to 0.73	0.64	0.47 to 0.89
Female* IIIM	1.00		1.00
Female* IV/V	(excluded)¶		(excluded)¶
N‡	12 152–12 276		13 311–13 482

*Registrar General's social class (RGSC) when child aged 11.
†Cases excluded because upward social mobility is logically impossible for this category.
‡Sample sizes for the 20 filled-in datasets after propensity score matching has been applied and logically impossible cases excluded.
§RGSC when child aged 10.
¶Cases excluded because downward social mobility is logically impossible for this category. IIINM, III non-manual; IIIM, III manual.