Table 1: Characteristics of patients in the CPCSSN database with a clinical encounter in the previous 2 years (n = 392 443; as of Sept. 30, 2013) compared with the 2011 Canadian Census population (full census data, including non-CPCSSN provinces, n = 33 476 715)

Characteristic	CPCSSN	Census 2011⁸
Age, yr
Mean ± SD	43.1 ± 23.5	39.6 ± 22.6
Median (IQR)	44.0 (24.0-61.0)	40.0 (21.0-56.0)
Sex, %
Male	42.9	49.0
Female	57.1	51.0
Residence location, %
Urban	77.1	81.0
Rural	22.9	19.0
Province,* %
British Columbia	2.6	13.1
Alberta	15.8	10.9
Manitoba	8.2	3.6
Ontario	48.2	38.4
Quebec	1.6	23.6
Nova Scotia	14.1	2.8
Newfoundland	9.5	1.5

Note: CPCSSN = Canadian Primary Care Sentinel Surveillance Network,

IQR = interquartile range.

*Census total does not add up to 100.0% because non-CPCSSN provinces were excluded.