Table A.1
Sample loss and size by selection criteria
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Sample selection procedure | Sample size | |
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Note: The application of selection criteria was sequential. As such, the numbers shown in the above table do not necessarily represent the number of children in the sample with a particular characteristic (e.g., children whose biological mother was not the PMK at all time points may also include some children who were not first-borns). Table source: Statistics Canada, 2008, "The Children of Older First-time Mothers in Canada: Their Health and Development", Children and Youth Research Paper Series, Catalogue number 89-599-M. |
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Total number of 0 to 1-year-olds interviewed in cycles 3 through 6 | 18,907 | |
Children who were dropped from the longitudinal sample | -152 | |
Additional children lost to attrition | -3,094 | |
Additional children whose biological mother was not the PMK at all time periods | -3,211 | |
Additional children who were not first-born | -8,456 | |
Additional children for whom first-born status was unknown | -612 | |
Total number of children included in this study | 3,382 |
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