Table 2. Assessment of gestational duration of women undergoing medical abortion provided by nurses or physicians in Mexico City, 2012–2013.

Characteristic	Physicians’ group (n = 514)	Nurses’ group (n = 503)	Total (n = 1017)	P
No. of women reporting last menstrual period, (%)	464 (90.3)	451 (89.7)	915 (90)
Duration of gestation from last menstrual period in days, mean (SD)	51.8 (14)	53.2 (16.8)	52.5 (16.1)	0.136
No. of women with ultrasound assessment, (%)	501 (97.5)	489 (97.2)	990 (97.3)
Duration of gestation determined by ultrasound in days, mean (SD)	49.7 (13.3)	49.7 (14)	49.7 (13.3)	0.914

SD: standard deviation.