Question

In 2013, a 7-day physical activity (PA) recall questionnaire was mailed to all patients who underwent bariatric surgery in a North West hospital during 2009-2012 (n=782). Among those who returned the questionnaire, bariatric patient participating in the pre-surgical wellness program was considered as the intervention group (Group I, n=44) while the surgery only patients served as control (Group C, n=58). Based on participants’ responses to the PA questionnaire, metabolic equivalent minutes per week (MET-min) was calculated as an indicator for PA. Two independent sample t-test was used to determine the effect of the wellness program on post-surgical physical activity levels. The 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	MET-min
		Mean	SD	t	p-value
Group I	44	4759.58	5454.90
Group C	58	2877.15	3043.14	2.22	0.023

Select one or more:

1. The pre-surgical wellness program had a significant impact on MET minutes
2. Post-surgical MET minutes reported by the group I is significantly lower than those reported by group C
3. The pre-surgical wellness program did not have a significant impact on MET minutes
4. Post-surgical MET minutes reported by Group I is not significantly different from those reported by Group C
5. Post-surgical MET minutes reported by Group I is significantly higher than those reported by Group C

Answer 1

The answer is that

a) the pre surgical wellness program had a significant impact on MET minutes

E)post surgical MET minutes reported by group I is significantly higher than those reported by group C

As the p value of 0.02 is statisticaly significant with an alpha of 0.05 which shows that the intervention has a significant role in increasing the MET minutes post surgery