Changes in family income status and the development of overweight and obesity from 2 to 15 years: a longitudinal study

Table 1 Baseline characteristics of population-based sample and analysis sample

Income measure	Population sample		Analysis sample		p-value^a
	n = 595		n = 517
	%	N	%	N
Low-income at birth					0.50
Yes	44	257	43	220
No	56	334	57	293
Missing		4		4
Early-life risk factors
Maternal overweight/obesity					0.57
Yes	50	295	49	254
No	50	300	51	263
Gestational weight gain					0.28
Excessive	47	282	47	244
Inadequate	18	106	17	88
Within recommendations	35	207	36	185
Smoking during pregnancy					0.89
Yes	20	114	20	99
No	80	477	80	414
Missing		4		4
Control Variables
Multiparious					0.23
Yes	41	243	42	216
No	49	352	48	301
Age category					0.14
18 to 25 years	26	153	27	140
25 years to 30 years	33	195	32	167
Older than 30 years	41	247	41	210
Birthweight					0.17
<3265 grams	26	157	25	128
≥3930 grams	25	147	25	128
3265 - <3930 grams	49	291	50	261
Sex					0.12
Female	47	278	48	248
Male	53	317	52	269

^aChi-squared analysis p-value comparing analysis sample and those not included (n = 68) from the population sample.

ISSN: 1471-2458