182 | Chapter 16 Appendix B Table B1 Binomial logistic event history analysis of completely withdrawing from sport in young adulthood (age 18 to 35)a S CONTROL VARIABLES Female Age Period Educational level Migration background Native Dutch origin (ref.) Non-native of non-western origin Non-native of western origin Participation duration Number of sports Intrinsic motivation Sport participation in childhood LIFE EVENTSb Beginning work Start living on your own Start cohabiting or getting married Birth of first child Constant Model Chi-square Degrees of freedom Number of person-years Nagelkerke R Square 0.360*** -0.032*** 0.003 0.049 0.016 -0.015 -0.102*** -1.824*** -0.080 -0.249*** 0.209 0.490*** 0.227 0.359* -5.592 1066.611 14 24947 0.151 b 0.069 0.008 0.003 0.045 0.131 0.133 0.012 0.108 0.080 0.087 0.142 0.131 0.143 0.170 5.035 s.e. 1.433 0.968 1.003 1.050 1.017 0.985 0.903 0.161 0.923 0.780 1.233 1.632 1.255 1.432 0.004 Exp(B) ource: SportersMonitor 2010 (N = 2272) +p<0.10; *p<0.05; **p<0.01; ***p<0.001 ( two-tailed) a The results of this analysis are largely comparable to those regarding stopping a sport as presented in chapter 3, Table 3.2. Only the significance of the effects is limited, probably due to less statistical power caused by a lower occurrence of events: respondents stopped practising a sport in general 2854 times, but only in 958 of those cases it meant they completely stopped practising sport. b Results of sensitivity analyses in which the life events were added separately in the model were similar. However, probably caused by issues of statistical power as mentioned above, the effects of beginning work and start cohabiting or getting married are significant as well when added alone (at a significance level of 0.10 and 0.01, respectively).
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