| However, it considers only sibship means and does not account for biological relationships between subjects within families. |
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| The first is the percentage of each sibship that is female, given that women generally do a disproportionate share of maintaining kinship ties. |
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| Multiple births are designated by joining the individual symbols to the same point on the sibship line. |
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| Family identity was maintained so that sibship was not confounded with any of the other assignments, but was not otherwise considered in statistical analyses. |
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| Potential confounding by parental educational status, parental smoking, sibship size, and housing style, and interactions with site of residence, were also explored. |
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| This phenomenon can be explained in part by the underlying genetic basis of these diseases but this does not account for one sister in a sibship developing pernicious anemia while another develops Hashimoto's thyroiditis. |
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