Table 1 . Characteristics of participants .

Characteristics		Male (n=122)	Female (n=83)
Age, mean±SD		45.50 ± 9.04	38.00 ± 7.85
Specialty, n(%)	Gastroenterologist	66 (59.5)	17 (22.7)
	Internal medicine	35 (31.5)	26 (34.7)
	General practitioner	3 (2.7)	19 (25.3)
	Other	7 (6.3)	13 (17.4)
Work setting, n(%)	University	43 (52.4)	34 (50.7)
	Private	22 (26.8)	17 (23.9)
	Government	17 (20.7)	16 (25.4)
Role of gut microbiota in health, n(%)	Yes	117 (95.9)	77 (92.8)
	No	1 (0.8)	0
	I do not know	4 (3.3)	6 (7.2)
Contribution of gut microbiota to diseases, n(%)	Yes	98 (81.0)	69 (83.1)
	No	12 (9.9)	7 (8.4)
	I do not know	11 (9.1)	7 (8.4)
Possible manipulation of the microbiota, n(%)	Yes	106 (87.6)	72 (87.8)
	No	2 (1.7)	3 (3.7)
	I do not know	13 (10.7)	7 (8.5)