Variable	Modality	MBI			Total	Khi2	P value
Variable	Modality	low	Moderate	high
Gender	Male	10	23	17	50	3.2	0.2(ns)
Gender	Female	10	15	25	50	3.2	0.2(ns)
Age	Below 25 years	0	2	1	3	3.75	0.44(ns)
	between 25 and 35 years	16	30	38	84
	Over 45 years old	4	6	3	13
Professional status	Nurses	17	31	32	80	9.39	0.05 (s)
Professional status	Doctors	3	7	10	20	9.39	0.05 (s)
Number of hours worked	35 to 55 hours	19	33	35	89	0.95	0.62(ns)
Number of hours worked	56 to 75 hours	1	5	5	11	0.95	0.62(ns)