Table 1: Characteristics of health care providers who responded to a survey on the Ontario Maternal Serum Screening (MSS) Program
Characteristic	Group; no. (and %) of respondents*			p value
	Family physicians n = 778	Obstetricians n = 273	Midwives n = 46
Mean age, yr (and SD†)	38.7 ( 7.5)	48.0 (10.4)	40.9 ( 7.1)	0.0001
Sex	n = 763	n = 268	n = 46	0.001
Male	410 (53)	201 (75)	0
Female	363 (47)	67 (25)	46 (100)
Practice location	n = 769	n = 273	n = 43	0.001
Urban	529 (69)	250 (92)	35 (81)
Small town or rural‡	240 (31)	23 (8)	8 (19)
Practice type	n = 739	n = 265	n = 44	0.001
Solo	196 (27)	147 (55)	4 (9)
Group	543 (73)	118 (45)	40 (91)
Mean no. of pregnant women cared for in the past year (and SD)	32 (30)	276 (147)	47 (20)	0.0001
Mean no. of years providing antenatal care (and SD)	10 (8)	17 (11)	8 (4)	0.0001
*Unless otherwise specified. †SD = standard deviation. ‡Population less than 50 000.

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