Structured physical activity resulted in a significantly lower likelihood of having poor sleep quality ( adjusted odds ratios ( aOR ) for PSQI > 5 = 0.80 , 95 % confidence interval ( CI ) = 0.68-0 .94 ) , including fewer new cases ( aOR for PSQI > 5 = 0.70 , 95 % CI = 0.54-0 .89 ) , than health education but not in resolution of prevalent cases ( aOR for PSQI 5 = 1.13 , 95 % CI = 0.90-1 .43 ) .