TABLE 4.

Cumulative percent improvement in acne score

INTERVAL	MEAN	STANDARD DEVIATION	MEDIAN	CHI-SQUARE SUB R	p-VALUE*
Week 3	47.22	20.93	48.77	64.541	<0.001
Week 6	64.34	17.57	65.86
Week 8	86.01	10.83	90.03
*Friedman testt