METHODS	Overall , 644 patients received PP continuously from study entry through discontinuation or study completion and were grouped by baseline BMI ( kg/m2 ) : underweight ( BMI < 19 ; n = 29 , 4.5 % ) , normal-weight ( BMI 19 - < 25 ; n = 229 , 35.6 % ) , overweight ( BMI 25 - < 30 ; n = 232 , 36.0 % ) and obese ( BMI 30 ; n = 154 , 23.9 % ) .\