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. Author manuscript; available in PMC: 2015 May 19.
Published in final edited form as: Prev Sci. 2010 Mar;11(1):101–112. doi: 10.1007/s11121-009-0153-x

Table 5.

Sample demographic description by COL1 and COL2, by Wave

Outcome variable (%) W1 (cross-sectional)
W2 (cross-sectional)
N Overall COL1 COL2 p-value N Overall COL1 COL2 p-value
Youth characteristic:
Gender (%) female 268 48.6 51.5 45.2 255 47.1 51.7 42.7
male 284 51.4 48.5 54.8 0.137 286 52.9 48.3 57.3 0.036
Age (%) 11–12 274 50.4 50.2 50.6 143 26.6 28.6 24.5
13–15 270 49.6 49.8 49.4 0.925 396 73.5 71.4 75.5 0.289
Grades in school (mean, A=4.0; F=0.0) 533   2.8   2.8   2.9 0.104 518   2.9   2.9   3.0 0.785
Household composition:
 Number of adults in HH (mean) 338   3.0   3.0   3.0 0.954 375   3.1   3.2   3.0 0.617
 Number of children (mean) 371   3.9   4.0   3.8 0.528 380   3.9   4.1   3.8 0.183
Household economic characteristic
 Often no money for food (%) 479   6.90   6.10   7.90 0.427 467   7.9   5.4 10.5 0.042
 Often no money for heat (%) 481   6.00   5.30   7.00 0.432 467   6.0   5.4   6.6 0.588
 Often no money for electricity (%) 481   8.90   7.50 10.70 0.224 470   6.0   5.8   6.1 0.871
Life outside of school:
 # of sports, other activities (mean) 441   2.5   2.4   2.6 0.492 408   2.0   1.9   2.1 0.463
 Work for pay, last 12 months (%) 506 33.8 32.0 35.9 0.352 483 35.2 33.2 37.2 0.352
 Watches TV 3+ hours/day (%) 503 24.9 26.3 23.1 0.418 483 21.1 26.4 15.8 0.004
 Computer games 3+ hours/day (%) 503 17.1 19.3 14.4 0.143 481 17.5 19.0 15.9 0.369
 Combined screen time 5+ hrs/day 500 25.4 26.5 24.1 0.548 480 23.1 27.4 18.8 0.026
Cultural life (% strongly agree):
 Important to be part of tribe 535 51.0 45.9 56.7 0.026 514 50.8 50.6 51.0 0.888
 Speak or learning language 530 26.6 24.2 29.3 0.018 505 28.3 25.1 31.5 0.040
 Feels good re cultural background 533 59.1 55.9 62.7 0.069 513 51.1 51.6 51.5 0.913

Bold=p>.05