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Research

Representativeness of patients and providers in the Canadian Primary Care Sentinel Surveillance Network: a cross-sectional study

John A. Queenan, Tyler Williamson, Shahriar Khan, Neil Drummond, Stephanie Garies, Rachael Morkem and Richard Birtwhistle
January 25, 2016 4 (1) E28-E32; DOI: https://doi.org/10.9778/cmajo.20140128
John A. Queenan
Department of Family Medicine (Queenan, Khan, Drummond, Morkem, Birtwhistle), Queen's University, Kingston, Ont.; Community Health Sciences (Williamson, Garies), University of Calgary, Calgary, Alta.
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Tyler Williamson
Department of Family Medicine (Queenan, Khan, Drummond, Morkem, Birtwhistle), Queen's University, Kingston, Ont.; Community Health Sciences (Williamson, Garies), University of Calgary, Calgary, Alta.
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Shahriar Khan
Department of Family Medicine (Queenan, Khan, Drummond, Morkem, Birtwhistle), Queen's University, Kingston, Ont.; Community Health Sciences (Williamson, Garies), University of Calgary, Calgary, Alta.
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Neil Drummond
Department of Family Medicine (Queenan, Khan, Drummond, Morkem, Birtwhistle), Queen's University, Kingston, Ont.; Community Health Sciences (Williamson, Garies), University of Calgary, Calgary, Alta.
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Stephanie Garies
Department of Family Medicine (Queenan, Khan, Drummond, Morkem, Birtwhistle), Queen's University, Kingston, Ont.; Community Health Sciences (Williamson, Garies), University of Calgary, Calgary, Alta.
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Rachael Morkem
Department of Family Medicine (Queenan, Khan, Drummond, Morkem, Birtwhistle), Queen's University, Kingston, Ont.; Community Health Sciences (Williamson, Garies), University of Calgary, Calgary, Alta.
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Richard Birtwhistle
Department of Family Medicine (Queenan, Khan, Drummond, Morkem, Birtwhistle), Queen's University, Kingston, Ont.; Community Health Sciences (Williamson, Garies), University of Calgary, Calgary, Alta.
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    Figure 1

    Population pyramid comparing the 2013 CPCSSN sample population and the 2011 Canadian census, grouped by clinically relevant age categories. CPCSSN = Canadian Primary Care Sentinel Surveillance Network.

Tables

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    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)
    CharacteristicCPCSSNCensus 20118
    Age, yr
    Mean ± SD43.1 ± 23.539.6 ± 22.6
    Median (IQR)44.0 (24.0-61.0)40.0
    (21.0-56.0)
    Sex, %
    Male42.949.0
    Female57.151.0
    Residence location, %
    Urban77.181.0
    Rural22.919.0
    Province,* %
    British Columbia2.613.1
    Alberta15.810.9
    Manitoba8.23.6
    Ontario48.238.4
    Quebec1.623.6
    Nova Scotia14.12.8
    Newfoundland9.51.5

    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.

      • View popup
      Table 2: Sex-stratified proportions (95% CIs) of the Canadian population (2011 full census data) compared with the national sample patient population in the CPCSSN
      Characteristic by age groupCensus 2011 population
      N = 33 476 715
      CPCSSN national population
      N = 392 443
      No. of males,
      % (95% CI)
      n = 16 414 225
      No. of females,
      % (95% CI)
      n = 17 062 490
      Sex ratioNo. of males,
      % (95% CI)
      n = 168 316
      No. of females,
      % (95% CI)
      n = 224 127
      Sex ratio
      Infants, 0-4 yr961 150,
      5.85 (5.84-5.87)
      915 950,
      5.37 (5.36-5.38)
      1.0510 492,
      6.23 (6.12-6.35)
      10 390,
      4.64 (4.55-4.72)
      1.01
      Children, 5-19 yr3 025 790,
      18.43 (18.41-18.45)
      2 882 605,
      16.89 (16.88-16.91)
      1.0527 582,
      16.39 (16.21-16.56)
      28 886,
      12.89 (12.75-13.03)
      0.95
      Young adults, 20-39 yr4 309 075,
      26.25 (26.23-26.27)
      4 384 810,
      25.70 (25.68-25.72)
      0.9835 434,
      21.10 (20.86-21.25)
      58 415,
      26.06 (25.88-26.25)
      0.61
      Middle aged, 40-64 yr5 919 450,
      36.06 (36.04-36.09)
      6 132 845,
      35.94 (35.92-35.97)
      0.9760 236,
      35.79 (35.56-36.02)
      81 128,
      36.20 (36.00-36.40)
      0.74
      Older adults, 65 yr and older2 198 760,
      13.39 (13.38-13.41)
      2 746 280,
      16.09 (16.08-16.11)
      0.8034 572,
      20.54 (20.35-20.73)
      45 308,
      20.21 (20.05-20.38)
      0.76

      Note: CI = confidence interval, CPCSSN = Canadian Primary Care Sentinel Surveillance Network, sex ratio = no. of males/no. of females.

        • View popup
        Table 3: Representativeness of physicians in the national CPCSSN data (up to Sept. 30, 2013) compared with respondents to the 2013 NPS
        CharacteristicNo. (%) of CPCSSN physicians
        n = 478
        No. (%) of 2013 NPS respondents
        n = 31 799
        Age, yr
        < 3559 (13.7)3 434 (10.8)
        35-44110 (25.5)6 805 (21.4)
        45-54125 (29.0)8 554 (26.9)
        55-64104 (24.1)9 000 (28.3)
        ≥ 6533 (7.7)4 007 (12.6)
        No. missing470
        Sex
        Male234 (48.9)17 807 (56.0)
        Female244 (51.0)13 992 (44.0)
        Practice location
        Urban/nonrural402 (84.1)26 432 (84.0)
        Rural76 (15.9)5 035 (16.0)
        No. missing0332
        Practice setting
        Academic primary care92 (19.3)1 982 (7.8)
        Nonacademic primary care386 (80.7)23 423 (92.2)
        No. missing06 394

        Note: CPCSSN = Canadian Primary Care Sentinel Surveillance Network, NPS = National Physician Survey.

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        Representativeness of patients and providers in the Canadian Primary Care Sentinel Surveillance Network: a cross-sectional study
        John A. Queenan, Tyler Williamson, Shahriar Khan, Neil Drummond, Stephanie Garies, Rachael Morkem, Richard Birtwhistle
        Jan 2016, 4 (1) E28-E32; DOI: 10.9778/cmajo.20140128

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        Representativeness of patients and providers in the Canadian Primary Care Sentinel Surveillance Network: a cross-sectional study
        John A. Queenan, Tyler Williamson, Shahriar Khan, Neil Drummond, Stephanie Garies, Rachael Morkem, Richard Birtwhistle
        Jan 2016, 4 (1) E28-E32; DOI: 10.9778/cmajo.20140128
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