. 2011 Dec;101(12):2308–2316. doi: 10.2105/AJPH.2011.300298

TABLE 1.

Children's Demographic and Health Characteristics, by Child Health Indicator Group: National Longitudinal Survey of Children and Youth, Canada, 1994–2005

Characteristics	Healthy Children (n = 3722), % or Mean (SD)	Children With 1 Health Indicator (n = 3229), % or Mean (SD)	Children With 2 Health Indicators (n = 1709), % or Mean (SD)	Children With ≥ 3 Health Indicators (n = 741), % or Mean (SD)
Demographics
Male	47.2^b ^c ^d	51.6^a ^c ^d	58.6^a ^b	60.5^a ^b
Age at baseline, y	7.4^d (2.4)	7.4^d (2.3)	7.5^d (2.3)	8.1^a ^b ^c (2.1)
Only child	18.6^b	14.4^a ^d	17.7	19.8^b
Child health status at baseline
Excellent/very good general health	94.3^b ^c ^d	88.5^a ^c ^d	74.4^a ^b ^d	51.0^a ^b ^c
Injured in the past y	7.8^b ^c ^d	13.3^a	14.3^a	16.1^a
No. of doctor visits in the past y	1.5^b ^c ^d (1.4)	4.1^a ^c ^d (6.0)	7.0^a ^b ^d (8.9)	13.2^a ^b ^c (17.9)
Behavior problems	21.7^b ^c ^d	28.3^a ^c ^d	36.0^a ^b ^d	54.9^a ^b ^c

Estimate differs significantly (P < .001) from group of healthy children.

Estimate differs significantly (P < .001) from group of children with 1 indicator.

Estimate differs significantly (P < .001) from group of children with 2 indicators.

Estimate differs significantly (P < .001) from group of children with ≥ 3 indicators.