4.

Hazard ratio by treatment groups and duration

		Exp(B)	95%CI	P
*P < 0.05 was considered statistically significant.
Treatment groups	HAD group	1	0.328-0.974	0.040*
	Combined group	0.565
Treatment duration	< 4 wks	1	0.438-1.279	0.289
	≥4 wks	0.748