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Using this strategy, we avoided predicting an outcome with characteristics that were clearly measured after the event had occurred. Of the 1,067 respondents with data available on the dependent variable at tiffany bracelets on sale Wave 2, 92 had sex prior to their Wave 1 age, and an additional 60 cases had missing data on one or more of the independent variables tiffany Pendants on sale (analysis N = 915). A drawback to our approach, however, is the potential for sample selection bias. For instance, respondents who reported having had sex prior to their Wave 1 age were older than Wave 1 interview-year virgins. To address tiffany earrings on sale the possibility that our results were influenced by characteristics of the sample that were selected for analysis, we ran our models including respondents with ages of first intercourse prior to their Wave 1 age. These expanded analyses yielded essentially the same results as our restricted sample, enhancing our confidence in the findings reported later .
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