Table 6.

GEE model of change in Serum PSA (ng/mL) from baseline to postintervention by study arm (N = 74)

25% QuartileMedian75% Quartile
TreatmentTime (mo)Nng/mLng/mLng/mLTreatment effect on overall PSA changeaPa
Placebo0373.704.806.10
6363.555.456.30
12283.654.906.15−0.87 ng/mL (95% CI, −1.66 to −0.09)0.029
Polyphenon E0363.504.455.60
6352.803.705.20
12292.803.505.10
  • aThe P value and overall serum PSA change from GEE model accounts for all values at 6 and 12 months, and estimates an overall treatment effect during the study.