Table 1

Child health indicators and time-varying covariates in the initial four rounds of the QLSCD (1998–2001)
Survey round
Age of child 5 months 17 months 29 months 41 months
Total sample size 2 120 2 045 1 997 1 950
Health indicators
Number of mother-reported asthma-like attacks* - past 12 months: M (SD) - 0.27 (1.66) 0.23 (1.42) 0.17 (1.11)
Maternal perception of child’s health as being less than very good - past 12 months : % 7.9 11.2 9.7 11.0
Time-varying covariates
Household income sufficiency - past 12 months N=2 078 N=2 007 N=1 968 N=1 893
 Sufficient : % 72.4 76.0 78.0 79.9
 Insufficient : % 27.6 24.0 22.0 20.1
Predicted household income sufficiency†† N=1 886 N=1 884 N=1 886 N=1 894
 Sufficient : % 72.3 74.4 76.7 77.6
 Insufficient : % 27.7 25.6 23.3 22.4
Type of family - past 12 months N=2 112 N=2 041 N=1 993 N=1 945
 Two biological parents : % 80.0 78.0 76.1 75.0
 Two parents, one biological : % 10.8 11.2 11.2 11.6
 Single parent : % 9.2 10.8 12.7 13.4
Parents smoke at home - past 12 months N=2 119 N=2 038 N=1 989 N=1 936
 No / occasionally : % 75.5 69.9 72.9 74.6
Daily : % 24.5 30.1 27.1 25.4
Type of child care - past 12 months N=2 120 N=2 045 N=1 997 N=1 950
 In child’s home : % 90.0 53.6 49.6 36.4
 External home-based daycare : % 8.3 36.6 33.6 32.7
 Daycare centre : % 1.7 9.8 16.8 30.9

*Numbers and percentages at 17 months of age pertain to mother-reported asthma-like attacks having occurred since birth.

M (SD): Mean (Standard Deviation); †Weighted percentages.

††Predicted among the 1,950 children who were followed-up to age 41 months.

Béatrice et al.

Béatrice et al. BMC Pediatrics 2012 12:141   doi:10.1186/1471-2431-12-141

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