Table 2.

Monthly hours of work of Iranian GPs based on demographic and practice variables

Variables		Mean	Standard deviation	Minimum	Maximum	P
Monthly hours of work		142.27	71.56	18.33	424.66
Gender	Male	163.09	70.77	21.66	424.66	P=0.000
	Female	114.68	62.88	18.33	416.66
Age	26-35 years	140.7	69.96	18.33	312	P=0.060
	36-45 years	131.17	65.94	20.41	336
	46-55 years	148.82	75.03	20	424.66
	56=<years	158.66	75.49	32	400
Marital status	Single	144.25	70.39	25	400	P=0.822
	Married	142.15	71.95	18.33	424.66
Practice experience	0-5 years	140.44	69.03	18.33	312	P=0.001
	6-10 years	111.60	63.9	20	260
	11-15 years	142.44	77.79	20.41	416.66
	16-20 years	153.28	73.23	23	424.66
	21=<years	155.38	65.64	28	400
Practice location	Tehran	121.06	65.45	18.33	312	P=0.000
	Other province center	138.15	68.41	33.33	400
	Other cities and villages	165.14	69.15	25	416.66
Working in proprietary office	Yes	146.46	76.6	18.33	424.66	P=0.321
	No
Working in rental office	Yes	132.29	64.6	23	312	P=0.039
	No
Working in public clinic	Yes	152.69	63.39	20	336	P=0.110
	No
Working in private clinic	Yes	136.09	73.83	20.41	364	P=0.340
	No
Working in public hospital	Yes	134.18	60.53	40	364	P=0.490
	No
Working in private hospital	Yes	122.31	64.96	28	250	P=0.312
	No
Working in other organizations	Yes	121.41	55.85	20.41	242.66	P=0.028
	No
Practice type	Public only	159.58	61.77	20	364	P=0.022
	Private only	143.06	76.75	18.33	424.66
	Public and private	125.24	58.04	20.41	312
Family physician	Yes	167.36	50.96	60	306	P=0.013
	No	139.6	73.05	18.33	424.66