Body mass index and height over three generations: evidence from the Lifeways cross-generational cohort study

BMC Public Health

Table 8 Estimates and standard errors of covariates in the best fitting mixed models fitted to BMI

Effect	Group	Estimate	Standard error	p-value		Correlation	95% CI	p-value
Model a) Fitted to all family members ‡
Child	1	19.56	1.41		Child and Mother	0.17	(0.06, 0.26)	0.0015
Mother	2	22.08	1.11		Child and MGM	0.25	(0.08, 0.42)	0.0054
Father	3	35.07	5.47		Child and MGF	-0.23	(-0.43,-0.01)	0.0409
MGM	4	26.23	2.73		Mother and MGM	0.28	(0.10, 0.44)	0.0021
MGF	5	30.44	3.04		Mother and MGF	0.25	(0.01, 0.46)	0.0408
PGM	6	30.86	3.99
PGF	7	24.65	5.13
SRH 0 vs 1 & 2		-1.26	1.77
Effect of age within each group
Age*Child		-0.57	0.26	0.0294
Age*Mother		0.04	0.03	0.16
Age*Father		-0.23	0.13	0.0842
Age*MGM		0.004	0.04	0.9126
Age*MGF		-0.05	0.05	0.2572
Age*PGM		-0.08	0.06	0.2274
Age*PGF		0.11	0.08	0.1789
Age*SRH (SRH = 0)		-0.08	0.04	0.0342
Group 7 (PGF): Fruitveg 0 vs 1		-4.93	-1.67	0.0032
Model b) Maternal line§‡
SRH 0 vs 1&2		-3.33	1.23	0.0071	Child and Mother	0.18	(0.08, 0.28)	0.003
					Child and MGM	0.23	(0.06, 0.39)	0.0078
					Child and MGF	-0.23	(-0.43,-0.02)	0.028
					Mother and MGM	0.29	(0.12, 0.44)	0.0009
					Mother and MGF	0.25	(-0.02, 0.41)	0.0733
Model c) Paternal line†
SRH 0 vs 1&2		-3.2	1.48	0.0308
Group 7 (PGF): Fruitveg 0 vs 1		-4.92	1.66	0.0036
Effect of age within each group
Age*Child		-0.55	0.26	0.0352
Age*Father		-0.247	0.135	0.07
Age*PGM		-0.095	0.064	0.1407
Age*PGF		0.072	0.814	0.3742

Also shown are the significant ( p < 0.05) correlation estimates between family members.
MGM: Maternal grandmother, MGF: Maternal grandfather, PGM: Paternal grandmother, PGF: Paternal grandfather
§ There was a negative effect of age on BMI but only borderline significance p = 0.075
† Model with vs without correlation terms p < 0.05; ‡Model with vs without correlation terms p < 0.0001

ISSN: 1471-2458