Prevalence: Report from the Canadian Chronic Disease Surveillance System: Hypertension in Canada, 2010

Adults with Diagnosed Hypertension (Prevalence)Footnote 1

  • In 2006/07, nearly 6 million Canadians aged 20years and older,Footnote 2  or more than 1 in 5, had diagnosed hypertension (approximately 5.9 million adults; 3.2 million women and 2.7 million men, crude prevalence).
  • The prevalence rate of hypertension among Canadians aged 20 years and older was 22.7% in 2006/07 (24.0% for women and 21.3% for men, crude prevalence) (Table 1). This prevalence is consistent but somewhat higher than the self-reported value reported from the 2007/08 Canadian Community Health Survey (19.4%). Self-reported hypertension values may be lower because approximately 5% of people who report drug treatment for hypertension do not report having hypertension in Canadian self-report surveys, possibly because they think that they do not have hypertension or that their hypertension has been cured when their blood pressure is controlled using medication or lifestyle modification.Footnote 13 These surveys also sample only the household population, whereas, CCDSS includes all Canadians residing in the provinces and territories with the previously noted exceptions.
  • After accounting for changes in the age distribution in the population over time, the age-standardized prevalence rate of diagnosed hypertension increased from 12.9% in 1998/99 to 19.6% in 2006/07 (Figure 1). One likely contributor to this rise in hypertension prevalence is the decline in mortality among people with hypertension and other cardiovascular diseases, as noted in other studies.Footnote 17 Footnote 18 Large reductions in mortality rates from stroke, heart failure, and acute myocardial infarction were found to be significantly associated with increases in antihypertensive prescriptions, especially after the initiation of the Canadian Hypertension Education Program (CHEP) in 1999, a program developed to improve the management of hypertension.Footnote 18 Before 1999, total antihypertensive prescriptions among Ontarians newly treated for hypertension were increasing by 2% per year, but after 1999 they were increasing at a rate of 10% per year.Footnote 19
  • Age-specific prevalence rates were similar between men and women for those under age 50. However, rates for women were increasingly higher than men from age 55 onwards. (Table 2 and Figure 2) This is consistent with other surveys that have found higher rates of hypertension in men in younger ages and higher rates in women in older ages.Footnote 20 Footnote 21
  • In Canada, the age-standardized prevalence rates of hypertension were highest in the Atlantic provinces and lowest in the west and north (Yukon, Northwest Territories, and British Columbia) (Figure 3). This is similar to the east-west gradient reported in other studies of obesity and diabetes trends across the country.Footnote 22 Footnote 23 Crude prevalence rates are presented in Table 3.

Figure 1. Age-Standardized Prevalence Rates of Diagnosed Hypertension among People Aged 20 Years and Older, by Sex

Figure 1. Age-Standardized Prevalence Rates of Diagnosed Hypertension among People Aged 20 Years and Older, by Sex
Text Equivalent - Figure 1

Age-standardized prevalence rates of diagnosed hypertension among people aged 20 years and older, by sex, from 1998/99 to 2006/07 are presented in Figure 1. Note that data for Nunavut and Québec were unavailable and rates were standardized to the 1991 Canadian population.

After accounting for changes in the age distribution in the population over time, the age-standardized prevalence rate of diagnosed hypertension increased from 12.9% in 1998/99 to 19.6% in 2006/07. For additional information, refer to the first paragraph on page 6.

Figure 2. Prevalence Rates of Diagnosed Hypertension among People Aged 20 Years and Older, by Age Group and Sex

Figure 2. Prevalence Rates of Diagnosed Hypertension among People Aged 20 Years and Older, by Age Group and Sex
Text Equivalent - Figure 2

Prevalence rates of diagnosed hypertension among people aged 20 years and older, by age group and sex are presented in Figure 2 for the year 2006/07. Note that data for Nunavut and Québec were unavailable.

Age-specific prevalence rates were similar between men and women for those under age 50. However, rates for women were increasingly higher than men from age 55 onwards. For additional information, refer to the second paragraph on page 6.

Figure 3. Age-Standardized Prevalence Rates of Diagnosed Hypertension among People Aged 20 Years and Older

Figure 3. Age-Standardized Prevalence Rates of Diagnosed Hypertension among People Aged 20 Years and Older
Text Equivalent - Figure 3

Age-standardized prevalence rates of diagnosed hypertension among people aged 20 years and older, by sex, province and territory are presented in Figure 3 for the year 2006/07. Note that data for Nunavut and Québec were unavailable and rates were standardized to the 1991 Canadian population.

In Canada, the age-standardized prevalence rates of hypertension were highest in the Atlantic provinces and lowest in the west and north (Yukon, Northwest Territories, and British Columbia). For additional information, refer to the third paragraph on page 6.

Table 1. Prevalence Rates, Incidence Rates, and Number of Cases of Diagnosed Hypertension, by Year and Sex, Canada,Footnote * 1998/99 to 2006/07
Fiscal Year Prevalence Rate (%) Incidence Rate (per 1,000)
Women Men Total Women Men Total
1998/99 Crude Rates 15.3 12.3 13.8 25.6 22.1 23.8
Cases 1,781,304 1,365,617 3,146,921 258,613 219,782 478,396
Population 11,645,517 11,088,924 22,734,441 10,122,826 9,943,090 20,065,916
1999/00 Crude Rates 16.8 13.7 15.3 25.2 22.4 23.8
Cases 1,984,800 1,541,232 3,526,032 253,673 221,841 475,514
Population 11,794,275 11,238,530 23,032,805 10,063,148 9,919,139 19,982,286
2000/01 Crude Rates 18.3 15.1 16.7 25.6 23.2 24.4
Cases 2,185,146 1,720,683 3,905,830 257,052 230,727 487,779
Population 11,968,953 11,419,133 23,388,086 10,040,859 9,929,176 19,970,035
2001/02 Crude Rates 19.5 16.3 18.0 25.1 23.1 24.1
Cases 2,375,007 1,894,157 4,269,164 252,047 229,238 481,284
Population 12,157,311 11,609,975 23,767,286 10,034,351 9,945,055 19,979,406
2002/03 Crude Rates 20.7 17.5 19.1 24.8 22.9 23.9
Cases 2,555,268 2,061,378 4,616,647 249,154 228,254 477,408
Population 12,341,930 11,792,606 24,134,536 10,035,816 9,959,482 19,995,297
2003/04 Crude Rates 21.7 18.5 20.2 24.1 22.5 23.3
Cases 2,723,285 2,220,505 4,943,790 241,987 224,521 466,509
Population 12,537,082 11,996,925 24,534,007 10,055,784 10,000,941 20,056,726
2004/05 Crude Rates 22.6 19.5 21.1 23.2 22.4 22.8
Cases 2,877,956 2,375,826 5,253,782 233,435 225,121 458,557
Population 12,729,881 12,189,561 24,919,442 10,085,360 10,038,856 20,124,217
2005/06 Crude Rates 23.4 20.4 22.0 22.7 22.8 22.7
Cases 3,025,193 2,532,606 5,557,799 229,887 229,974 459,860
Population 12,930,898 12,387,986 25,318,884 10,135,592 10,085,353 20,220,945
2006/07 Crude Rates 24.0 21.3 22.7 21.6 22.7 22.1
Cases 3,161,283 2,687,181 5,848,464 220,128 229,900 450,029
Population 13,152,159 12,601,762 25,753,921 10,211,005 10,144,481 20,355,486
Source: Public Health Agency of Canada, using CCDSS data files contributed by provinces and territories as of September, 2009.
Footnote *

Data for Nunavut were unavailable. Data for Québec were also unavailable. However, the number of cases for Québec was estimated by applying the Canadian age-specific rates of diagnosed hypertension weighted to the Québec population.

Return to - Footnote * referrer

Text Equivalent - Table 1

Crude prevalence and incidence rates as well as the number of cases of diagnosed hypertension by year and sex, from 1998/99 to 2006/07, are presented in Table 1. Note that data for Nunavut and Québec were unavailable. However, for this analysis, the number of cases for Québec was estimated by applying the Canadian age-specific rates of diagnosed hypertension weighted to the Québec population.

The prevalence rate of hypertension among Canadians aged 20 years and older was 22.7% in 2006/07 (24.0% for women and 21.3% for men, crude prevalence). For additional information, refer to the last paragraph on page 5.

In 2006/07, 450,029 adults were newly diagnosed with hypertension (22.1 per 1,000 population aged 20 years and older, 21.6 per 1,000 women and 22.7 per 1,000 men).

Table 2. Prevalence Rates, Incidence Rates, and Number of Cases of Diagnosed Hypertension, by Sex and Age Group, Canada,Footnote * 2006/07
Age Group Prevalence Rate (%) Incidence Rate (per 1,000)
Women Men Total Women Men Total
20 to 24 Crude Rates 0.5 0.6 0.6 1.8 2.2 2.0
Cases 6,049 6,811 12,859 1,968 2,552 4,520
Population 1,118,706 1,154,031 2,272,737 1,114,625 1,149,772 2,264,398
25 to 29 Crude Rates 1.7 1.8 1.8 3.0 3.6 3.3
Cases 19,849 20,150 39,999 3,339 3,998 7,337
Population 1,136,351 1,131,680 2,268,031 1,119,841 1,115,528 2,235,369
30 to 34 Crude Rates 3.3 3.7 3.5 4.8 6.3 5.6
Cases 38,209 42,285 80,494 5,326 7,021 12,348
Population 1,149,220 1,144,965 2,294,185 1,116,337 1,109,702 2,226,039
35 to 39 Crude Rates 5.4 6.2 5.8 7.8 10.2 9.0
Cases 66,168 77,056 143,223 9,132 11,900 21,032
Population 1,231,521 1,237,898 2,469,419 1,174,485 1,172,742 2,347,227
40 to 44 Crude Rates 8.9 9.9 9.4 13.2 15.2 14.2
Cases 125,456 141,165 266,621 17,036 19,742 36,778
Population 1,404,160 1,419,310 2,823,470 1,295,740 1,297,887 2,593,627
45 to 49 Crude Rates 14.6 15.4 15.0 20.3 22.2 21.3
Cases 204,370 215,809 420,179 24,828 26,955 51,783
Population 1,400,517 1,404,849 2,805,366 1,220,975 1,215,995 2,436,970
50 to 54 Crude Rates 23.1 23.2 23.1 29.3 31.8 30.5
Cases 287,059 285,892 572,951 28,898 31,152 60,050
Population 1,244,669 1,234,522 2,479,191 986,508 979,782 1,966,290
55 to 59 Crude Rates 33.6 33.0 33.3 38.8 42.9 40.9
Cases 365,949 354,998 720,947 29,223 32,340 61,563
Population 1,089,324 1,075,714 2,165,038 752,599 753,055 1,505,654
60 to 64 Crude Rates 44.0 42.8 43.4 52.5 57.6 55.0
Cases 368,882 350,900 719,782 26,012 28,619 54,631
Population 838,580 819,559 1,658,139 495,710 497,278 992,988
65 to 69 Crude Rates 54.6 51.9 53.3 68.8 70.6 69.7
Cases 359,115 320,562 679,678 22,079 22,568 44,648
Population 657,957 617,542 1,275,499 320,921 319,548 640,469
70 to 74 Crude Rates 63.8 59.9 61.9 82.6 78.9 80.8
Cases 363,189 304,282 667,471 18,580 17,485 36,065
Population 569,572 508,323 1,077,895 224,963 221,526 446,489
75 to 79 Crude Rates 70.4 65.4 68.2 92.2 85.6 89.0
Cases 355,346 263,909 619,255 15,162 13,072 28,235
Population 504,721 403,535 908,256 164,537 152,698 317,235
80 to 84 Crude Rates 75.1 68.8 72.6 93.7 86.9 90.7
Cases 304,933 181,092 486,025 10,462 7,803 18,265
Population 406,117 263,105 669,222 111,646 89,817 201,463
85+ Crude Rates 74.0 65.5 71.3 72.1 67.9 70.5
Cases 296,709 122,271 418,979 8,082 4,693 12,775
Population 400,744 186,729 587,473 112,117 69,151 181,268
Total Crude Rates 24.0 21.3 22.7 21.6 22.7 22.1
Cases 3,161,283 2,687,182 5,848,465 220,128 229,900 450,028
Population 13,152,159 12,601,762 25,753,921 10,211,005 10,144,481 20,355,486
Source: Public Health Agency of Canada, using CCDSS data files contributed by provinces and territories as of September, 2009.
Footnote *

Data for Nunavut were unavailable. Data for Québec were also unavailable. However, the number of cases for Québec was estimated by applying the Canadian age-specific rates of diagnosed hypertension weighted to the Québec population.

Return to - Footnote * referrer

Text Equivalent - Table 2

Crude prevalence and incidence rates as well as the number of cases of diagnosed hypertension by sex and age group are presented in Table 2 for the year 2006/07. Note that data for Nunavut and Québec were unavailable. However, for this analysis, the number of cases for Québec was estimated by applying the Canadian age-specific rates of diagnosed hypertension weighted to the Québec population.

Age-specific prevalence rates were similar between men and women for those under age 50. However, rates for women were increasingly higher than men from age 55 onwards.

Table 3. Prevalence Rates, Incidence Rates, and Number of Cases of Diagnosed Hypertension, by Sex, Province and Territory, Canada,Footnote * 2006/07
Province/Territory Prevalence Rate (%) Incidence Rate (per 1,000)
Women Men Total Women Men Total
YT Crude Rates 17.3 17.0 17.1 28.4 30.0 29.2
Cases 2,135 2,162 4,297 299 327 626
Population 12,367 12,739 25,106 10,531 10,904 21,435
NT Crude Rates 13.0 12.9 12.9 14.6 16.1 15.4
Cases 2,012 2,160 4,172 200 239 439
Population 15,474 16,782 32,256 13,662 14,861 28,523
BC Crude Rates 22.5 20.3 21.4 22.9 24.3 23.6
Cases 385,332 333,112 718,444 31,143 32,598 63,741
Population 1,712,349 1,639,990 3,352,339 1,358,160 1,339,476 2,697,636
AB Crude Rates 20.6 18.7 19.6 18.6 20.8 19.7
Cases 263,410 235,205 498,615 19,291 21,793 41,084
Population 1,281,442 1,261,103 2,542,545 1,037,323 1,047,691 2,085,014
SK Crude Rates 26.8 22.9 24.9 22.0 23.5 22.8
Cases 102,865 84,983 187,848 6,315 6,888 13,203
Population 383,915 370,939 754,854 287,365 292,844 580,209
MB Crude Rates 25.7 22.0 23.9 21.5 23.4 22.4
Cases 116,654 95,111 211,765 7,410 8,096 15,506
Population 454,193 432,843 887,036 344,949 345,828 690,777
ON Crude Rates 23.7 21.4 22.6 20.6 21.5 21.0
Cases 1,254,002 1,087,005 2,341,007 84,870 87,653 172,523
Population 5,295,333 5,070,185 10,365,518 4,126,201 4,070,833 8,197,034
NB Crude Rates 27.8 23.7 25.8 24.3 25.6 24.9
Cases 84,281 67,938 152,219 5,447 5,737 11,184
Population 303,167 286,259 589,426 224,333 224,058 448,391
NS Crude Rates 29.6 25.6 27.7 24.9 26.3 25.6
Cases 117,346 93,801 211,147 7,105 7,375 14,480
Population 396,074 367,022 763,096 285,833 280,596 566,429
PE Crude Rates 27.3 23.0 25.2 22.8 24.9 23.9
Cases 15,381 12,216 27,597 958 1,044 2,002
Population 56,363 53,094 109,457 41,940 41,922 83,862
NL Crude Rates 29.4 27.3 28.4 31.1 33.0 32.0
Cases 60,477 52,529 113,006 4,649 4,780 9,429
Population 205,433 192,676 398,109 149,605 144,927 294,532

Source: Public Health Agency of Canada, using CCDSS data files contributed by provinces and territories as of September, 2009.

Footnote *

Data for Nunavut and Québec were unavailable.

Return to - Footnote * referrer

YT
Yukon
NT
Northwest Territories
BC
British Columbia
AB
Alberta
SK
Saskatchewan
MB
Manitoba
ON
Ontario
NB
New Brunswick
NS
Nova Scotia
PE
Prince Edward Island
NL
Newfoundland and Labrador.
Text Equivalent - Table 3

Crude prevalence and incidence rates as well as the number of cases of diagnosed hypertension by sex, province and territory are presented in Table 3 for the year 2006/07. Note that data for Nunavut and Québec were unavailable. For additional information, refer to figures 3 and 9 which present respectively age-standardized prevalence and incidence rates by province and territory for year 2006/07.

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