The self-report rates were higher at intake than either urine test ( 82.4 % vs. 77.0 % vs. 52.7 % ) , but both lower and higher at the 3-month follow-up ( 55.5 % vs. 70.0 % vs. 47.3 % ) and 6-month follow-up ( 60.2 % vs. 73.5 % vs. 55.8 % ) .
