Question

A randomized controlled trial was conducted to compare time to relapse in risperidone-(GroupR) vs. Haloperidol-treated (Group H) schizophrenic patients discharged from the hospital. Relapse was defined as the first re-hospitalization within one year after discharge. Logrank test (also called Mantel-Cox test) was used to examine time(days) to relapse. Test result is shown in the table below. Level of significance alpha=.05. which of the following statement is an appropriate interpretation of the test result

	n	Time to Relapse (days)		Logrank	p
		Median	Range
Group R	20	103.0	14.0-312.0	4.2	.04
Group H	13	28.0	27.0-54.0

Select one:

1. Time to relapse was significant shorter in Group R patients compared to those in Group H
2. Time to relapse was significant longer in Group R patients compared to those in Group H
3. Time to relapse did not differ significantly between Groups Rand H
4. Significant more Group R patients were re-hospitalized within one year than those in Group H

Answer 1

The statement which is an appropriate interpretation of the test result is option B .

Time to relapse was significant longer in Group R patients compared to those in Group H.