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Table 4 Binary logistic regression on drop out (yes/no) in sports – TENNIS (N = 1195)

From: Time-use and environmental determinants of dropout from organized youth football and tennis

Outcome = Dropout vs Member Model 1 (socio-demographic factors) Model 2 (model 1 + time use factors) Model 3 (model 2 + environmental factors) Model 4 (model 3 + motivational orientation)
Exp (B) 95% CI P Exp (B) 95% CI P Exp (B) 95% P Exp (B) 95% CI P
Constant 1.71   0.005 0.58   0.111 0.67   0.257 0.63   0.208
Control variables
 Age (17–21 = ref)
  13–16 1.14 0.83–1.56 0.424 0.96 0.64–1.45 0.852 0.96 0.64–1.45 0.853 0.95 0.63–1.43 0.808
 Sex (male = ref) 0.70 0.55–0.89 0.003 0.74 0.54–1.00 0.049 0.75 0.55–1.01 0.061 0.74 0.55–1.02 0.063
 Current education (high = ref)    0.165    0.039    0.107    0.093
  No 0.54 0.27–1.08 0.080 0.91 0.37–2.23 0.837 0.86 0.35–2.11 0.74 0.83 0.34–2.04 0.682
  Low 1.09 0.75–1.60 0.640 1.42 0.86–2.32 0.169 1.28 0.78–2.11 0.336 1.21 0.73–2.00 0.464
  Middle 1.19 0.83–1.72 0.343 2.00 1.21–3.31 0.007 1.78 1.07–2.96 0.026 1.77 1.06–2.94 0.028
 Played in selection (team) (no = ref) 0.45 0.35–0.58 0.000 0.53 0.38–0.74 0 0.57 0.40–0.79 0.001 0.59 0.42–0.82 0.002
Time use factors
 Time use indicators at this moment (average hrs per week)
  Tennis/football outside sports club     0.27 0.22–0.34 0 0.27 0.22–0.34 0 0.28 0.22–0.34 0
  Other sports     1.22 1.15–1.29 0 1.22 1.15–1.29 0 1.22 1.15–1.29 0
  Other (fixed) hobbies     1.03 0.97–1.10 0.375 1.03 0.97–1.10 0.326 1.04 0.97–1.11 0.277
  School/study and homework     1.00 0.99–1.01 0.756 1.00 0.99–1.01 0.726 1.00 0.99–1.01 0.84
  (Part-time) job     1.02 1.00–1.03 0.135 1.02 1.00–1.04 0.108 1.02 1.00–1.04 0.12
  Social activities (no of times)     1.16 1.04–1.31 0.011 1.16 1.03–1.31 0.013 1.17 1.04–1.32 0.01
 Time spent on side activities at sports club past season (hrs)     0.97 0.94–0.99 0.014 0.97 0.94–1.00 0.019 0.97 0.94–1.00 0.028
 Changes in job/school situation since past season
  Got job/increased work hrs (no = ref)     0.45 0.29–0.72 0.001 0.47 0.29–0.74 0.001 0.48 0.30–0.76 0.002
  Changed schools/further educ. (no = ref)     2.96 2.04–4.28 0 2.97 2.04–4.31 0 2.92 2.01–4.26 0
Environmental factors
 Travel distance to sports club (km)        0.97 0.94–0.99 0.007 0.96 0.94–0.99 0.006
 Neighbourhood density (strong – extremely urbanized = ref)          0.684    0.72
  Rural        0.94 0.63–1.40 0.761 0.98 0.65–1.46 0.901
  Hardly – moderately urbanized        1.10 0.77–1.57 0.599 1.12 0.78–1.60 0.544
Motivational factors
 Task orientation           0.84 0.71–0.99 0.032
 Ego orientation           0.90 0.77–1.05 0.166
-2 Log likelihood 1595.78    1082.24    1068.95    1062.54   
Cox&Snell R2 0.05    8.49    0.39    0.93   
Nagelkerke R2 0.073    0.51    0.52    0.52   
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BMC Public Health

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