
Figure 1
Study selection flow-chart.
Table 1
Characteristics of the studies included in the review.
| PUBLICATION | STUDY DURATION | COUNTRY | STUDY DESIGN | N | CARE SETTING | DIAGNOSIS CATEGORY | URBAN SETTING | % WOMEN | AGE | SOCIOECONOMIC STATUS |
|---|---|---|---|---|---|---|---|---|---|---|
| Castillo y Costa, 2018 | NA-2015 | Argentina | Cohort | 210 | MI, CABG, PCI | Unclear | 17.0 | 59.0 (9); 61.0 (9.0) | ||
| Fernandes, 2012 | 2003–2004 | Brazil | RCT | 45 | PCI | 38.0 | 62.7 (9.9), 26–89 | |||
| Gurfinkel, 2004 | 2001-NA | Argentina | RCT | 301 | ACS | Urban | 59 (8.7), 59 (7.9) | |||
| Ladeia, 2003 | 1995–1997 | Brazil | Cross-sectional | 104 | CHD | Urban | 32.7 | 60.9 (8.1) | Education: 10.6 | |
| Lima-Filho, 2010 | 2001–2002 | Brazil | Cohort | 70 | PCI | 22.9 | 57.6 (13.9), 59.4 (7.6) | |||
| Lorenzo, 2014 | 2008–2010 | Brazil | Cohort | 228 | CHD | Urban | 46.1 | 63.15 (12.26) | ||
| Baptista, 2012 | 2009–2011 | Brazil | Cohort | 97 | Academic or Tertiary Hospital | CABG | 33.3 | 63.5 (9.4), 42–81 | ||
| Bohatch, 2015 | 2011–2013 | Brazil | Cohort | 230 | Academic or Tertiary Hospital | CABG | 24.3 | |||
| Brasil, 2013 | NA-NA | Brazil | Cross-sectional | 710 | Academic or Tertiary Hospital | CHD | Urban | 57.4 (4.1) | ||
| Breda, 2008 | 2008–2005 | Brazil | RCT | 50 | Academic or Tertiary Hospital | CABG | Urban | 42.0 | 62.1 (12) | |
| Chaves, 2004 | 2001–2002 | Brazil | RCT | 96 | Academic or Tertiary Hospital | CHD | Urban | 51.0 | 65.07 (12.49) | |
| Chaves, 2019 | 2015–2017 | Brazil | RCT | 115 | Academic or Tertiary Hospital | CABG, PCI | Urban | 28.7 | 63.9 (10. 9), 63 (12.1) | Employmnent: 40 |
| Cruz, 2009 | 2004–2005 | Brazil | Cross-sectional | 103 | Academic or Tertiary Hospital | CHD | 67.9 (12.3) | |||
| Dayan, 2018 | 2006–2014 | Uruguay | retrospective | 282 | Academic or Tertiary Hospital | CABG | 26.6 | 65.58 (9.5), 61.75 (9.6) | ||
| Feguri, 2017 | 2014–2016 | Brazil | RCT | 574 | Academic or Tertiary Hospital | CABG | Urban | 33.0 | 62.12 (9.63), 60.93 (8.91) | |
| Fernandez, 2011 | 2006–2007 | Colombia | RCT | 400 | Academic or Tertiary Hospital | PCI | Urban | 45.0 | 58.0 (9.0) | |
| Furuya, 2014 | 2011–2012 | Brazil | RCT | 60 | Academic or Tertiary Hospital | PCI | Urban | 43.0 | 56.9 (10.8), 34–85 | Employment: 35.0 |
| Gomes, 2011 | 2002–2006 | Brazil | Cohort | 504 | Academic or Tertiary Hospital | PCI | Urban | 35.9 | 63.7 (11.0) | |
| Hueb, 2004 | 1995–2000 | Brazil | RCT | 611 | Academic or Tertiary Hospital | CHD | Urban | 15.0 | 60.25 (9.26), 58.92 (6.04) | |
| Kimura, 2018 | 2007–2013 | Brazil | Cohort | 520 | Academic or Tertiary Hospital | CABG | Urban | 72.1 | ||
| Liberato, 2016 | 2010–2011 | Brazil | Cross-sectional | 190 | Academic or Tertiary Hospital | ACS | Urban | 36.1 | 64.9, 32–93 | Employment: 31.0 |
| Nazzal, 2013 | 2008–2008 | Chile | Registry | 416 | Academic or Tertiary Hospital | ACS | Urban | 23.4 | Income: 20.0 | |
| Neira, 2013 | 2011–2011 | Chile | Cross-sectional | 202 | Academic or Tertiary Hospital | CHD | Urban | 29.7 | 58.9 (9.8), 60.6 (8.5) | Education: 17.4 Employment: 45.0 |
| Nery, 2015 | 2009–2012 | Brazil | RCT | 61 | Academic or Tertiary Hospital | ACS | Urban | 27.9 | 59.5 (9.4) | |
| Neves, 2012 | NA-NA | Brazil | descriptive, cross-sectional study | 20 | Academic or Tertiary Hospital | CHD | 0.0 | |||
| Noriega, 2008 | NA-NA | Chile | Non-randomized intervention | 64 | Academic or Tertiary Hospital | CABG, PCI | 20.3 | 64.0 (11.0), 63 (12.0) | ||
| Oliveira, 2019 | 2013–2015 | Brazil | Retrospective cohort | 536 | Academic or Tertiary Hospital | ACS | Urban | 36.0 | 65.6 | Education: 49.2; Income: 34.0 |
| Pantoni, 2016 | NA-NA | Brazil | Non-randomized intervention | 27 | Academic or Tertiary Hospital | CABG | Urban | 44.4 | 60.0 95% CI 51–68), 63.0 (95% CI 55–70), 61.0 (95% CI 53–73) | |
| Pellegrini, 2014 | 2002–2007 | Brazil | Cohort | 611 | Academic or Tertiary Hospital | ACS | Rural | 28.6 | 61.4 (11.6) | |
| Pesaro, 2012 | 2006–2009 | Brazil | RCT | 78 | Academic or Tertiary Hospital | CHD | Urban | 38.5 | 64.0 (12.0), 65.0 (12.0), 61.0 (12.0) | |
| Portal, 2003 | 1998–1999 | Brazil | RCT | 39 | Academic or Tertiary Hospital | CHD | 43.6 | 62,7 (10.7), 61.6 (11.1) | ||
| Ribeiro, 2015 | 2007–2008 | Brazil | Cross-sectional | 153 | Academic or Tertiary Hospital | PCI | Urban | 49.0 | 61.9 (11.9) | |
| Ribeiro, 2018 | 2014–2016 | Brazil | Cohort | 169 | Academic or Tertiary Hospital | Urban | 16.0 | 63.7 (9.6) | ||
| Rossi, 2014 | 2006–2006 | Argentina | Cohort | 125 | Academic or Tertiary Hospital | ACS | Urban | 34.4 | 56.0 (9.0), 60.0 (9.0) | |
| Rueda-Clausen, 2010 | 2005–2006 | Colombia | Cross-sectional | 34 | Academic or Tertiary Hospital | CHD | Urban | 23.5 | 64.0, 61.0 | |
| Saffi, 2013 | 2008–2010 | Brazil | RCT | 74 | Academic or Tertiary Hospital | CHD | 26.0 | 60.9(10.6), 63.4 (8.56), 59.9(11.8), 62.7(10.9) | Income: 58.0 | |
| Santos, 2015 | 2007–2010 | Brazil | Cohort | 198 | Academic or Tertiary Hospital | PCI | 30.3 | 55.0 (8.0), 52.0 (7.0), 54.0 (10.0) | ||
| Scherr, 2010 | 1997–2002 | Brazil | Non-randomized intervention | 2337 | Academic or Tertiary Hospital | CHD | Urban | 39.2 | 64.3 (10.7), 64.5 (10.9) | |
| Silva, 2005 | 1995–1998 | Brazil | RCT | 210 | Academic or Tertiary Hospital | CHD | Urban | 32.4 | 60.2 (10), 28–87 | |
| Silveira, 2007 | 2002–2003 | Brazil | RCT | 24 | Academic or Tertiary Hospital | CABG | 37.5 | 58.5 (9.4) | ||
| Silveira, 2008 | 1998–2005 | Brazil | Cohort | 310 | Academic or Tertiary Hospital | CHD | Unclear | 39.0 | ||
| Simon, 2019 | 2014–2015 | Brazil | RCT | 48 | Academic or Tertiary Hospital | ACS | 35.4 | |||
| Siniawski, 2019 | 2014–2017 | Argentina | Cross-sectional | 351 | Academic or Tertiary Hospital | ACS, CABG | Urban | 26.5 | 63.3 (12.4), 60.0 (87) | |
| Smidt, 2009 | 2002–2007 | Brazil | Registry | 611 | Academic or Tertiary Hospital | ACS | 36.6 | 60.9 (10.3), 31–81 | ||
| Souza Groia Veloso, 2020 | NA-NA | Brazil, Suriname | Cross-sectional | 148 | Academic or Tertiary Hospital | CHD | Unclear | 29.7 | Median 61.0 (IQR 54–68) | |
| Souza, 2013 | 2008–2010 | Brazil | Registry | 103 | Academic or Tertiary Hospital | ACS | Urban | 16.5 | 62.6 (9.3), 63.3 (11.3) | |
| Uchoa, 2015 | NA-NA | Brazil | Cohort | 67 | Academic or Tertiary Hospital | CHD, CABG | Urban | 25.0 | 61.2 (10.0), 68.6 (9.0) | |
| Vilar, 2015 | 2009–2010 | Brazil | Cross-sectional | 155 | Academic or Tertiary Hospital | CHD | 18.7 | 60.0 (9.0) | ||
| Villacorta, 2012 | 2006–2008 | Brazil | Cohort | 209 | Academic or Tertiary Hospital | PCI | Urban | 26 | Median 62.0 [IQR 17.0] | |
| Abreu-Silva, 2011 | 2008–2010 | Brazil | Registry | 535 | Other | PCI | 32.0 | 67.0 (10.4) | ||
| Alvarez, 2016 | 1993–2013 | Argentina | Cross-sectional | 866 | Other | ACS | 24.0 | 62.7 (11.1) | ||
| Berwanger, 2013 | NA-NA | Brazil | Cross-sectional | 681 | Other | ACS | ||||
| Fernandez, 2009 | 2003–2006 | Colombia | Cohort | 395 | Other | CHD | 32.7 | 64.4 (12.9), 66.8 (10.9) | ||
| Finimundi, 2007 | NA-NA | Brazil | RCT | 40 | Other | ACS | Urban | 43.0 | 60.1 (2.2), 63.21 (2.21) | |
| Gaedke, 2015 | NA-NA | Brazil | Cohort | 138 | Other | ACS | Urban | 44.4 | 62.5 (11.1) | Education: 54.8 Income: 33.3 |
| Gowdak, 2007 | 1998–2004 | Brazil | Cohort | 119 | Other | CHD | Urban | 57.4 (5.9), 58.3 (8.6) | ||
| Mattos, 2012 | 2010–2011 | Brazil | Registry | 2475 | Other | ACS | 32.2 | 64 (8.0), 65 (9.0), 66 (8.0) | ||
| Mendis, 2005 | 2002–2003 | Brazil | Cross-sectional | 836 | Other | CHD | Both | 56.0 (10.0) | ||
| Vazquez, 2011 | 2008–2009 | Uruguay | Cohort | 154 | Other | ACS | 21.4 | |||
| Vesga, 2006 | NA-NA | Colombia | Cross-sectional | 71 | Other | CHD | Urban | 28.2 | 58.4 (7.9) | |
| Avezum, 2017 | 2003–2009 | Argentina, Brazil, Chile, Colombia | Cross-sectional | 910 | Primary Care/Community | CHD | Urban and rural | 61.3 | 62.20 (11.60) | |
| Vianna, 2012 | 2008–2008 | Brazil | Cross-sectional | 295 | Primary Care/Community | ACS | Urban | |||
| Birck, 2019 | 2008–2010 | Brazil | Cross-sectional | 405 | Primary Care/Community | CHD | Urban | 36.5 | 61.6 (9.4) | Education: 48.6, Income: 38.3 |
| Stockins, 2011 | 2005–2006 | Chile | Cohort | 233 | Publi Hospital | ACS | 30.6 | 68.0 | ||
| Aguiar, 2010 | 1999–2007 | Brazil | Cohort | 377 | Public Hospital | ACS | 37.9 | 62.3 (9.3) | ||
| Carvalho, 2007 | 1992–2000 | Brazil | Retrospective cohort | 381 | Rehabilitation | 19.4 | ||||
| Gambogi, 2009 | 2004–2006 | Uruguay | Cohort | 900 | Rehabilitation | Both | 25.3 | 57.9 (9.9), 61.3 (7.7) | Education: 9.5 Employment: 44.6 | |
| Garlet, 2017 | 2015–2016 | Brazil | Cross-sectional | 102 | Rehabilitation | CHD | 31.4 | 61.7 (10.0), 64.5 (9.0) | ||
| Lelys, 2019 | 2015–2017 | Brazil | Cross-sectional | 115 | Rehabilitation | CHD | 28.7 | 59.9(8.6); 57.2 (9.0) | Employment: 40.0 | |
| Pantoni, 2014 | 2006–2008 | Brazil | Non-randomized intervention | 28 | Rehabilitation | CABG | Urban | 32.1 | 56.0 | |
| Fuchs, 2009 | 2005–2006 | Brazil | Cross-sectional | 39 | Rehbilitation | CHD | Urban | 10.3 | 63.7(95% CI 56.6–73.9) | |
| Castro, 2018 | 2018–NA | Brazil | Cohort | 525 | Secondary Hospital | ACS | Urban | 39.8 | 61.6 (11.9) | |
| Trivi, 2018 | 2010–2011 | Argentina | Cohort | 438 | Secondary Hospital | ACS | 24.2 | 59.2 (7.9) |
[i] Age is expressed in percentage (standard deviation) unless indicated otherwise; multiple values are given if age was reported by subgroups in the publication. Socioeconomic status indicates the percentage of participants included in the highest category of education or income, or percentage of employed participants. Abbreviations: RCT (randomized controlled trial), ACS (acute coronary syndrome), CABG (coronary artery bypass graft), CHD (coronary heart disease), PCI (percutaneous coronary intervention).

Figure 2
Risk of bias results.

Figure 3
Pooled prevalence of anti-hypertensive medication use.

Figure 4
Pooled prevalence of antiplatelet medication use.
Table 2
Summary of the meta-analysis results.
Pooled prevalence results are expressed in percentage and 95% confidence interval.
| VARIABLE | NUMBER OF STUDIES | POOLED PREVALENCE |
|---|---|---|
| Beta-blockers | 53 | 73.4 (66.8–79.1) |
| ACE inhibitors | 44 | 55.8 (49.7–61.8) |
| Aspirin | 44 | 85.1 (79.7–89.3) |
| Aspirin, clopidogrel or antiplatelet drugs | 51 | 84.6 (79.6–88.5) |
| Statins | 50 | 78.9 (71.2–84.9) |
| Insulin | 9 | 11.6 (7.0–18.8) |
| Antihypertensives (without specification) | 8 | 46.5 (33.7–59.8) |
| Diuretics | 8 | 30.1 (24.3–36.6) |
| Calcium chanel blockers | 6 | 34.0 (19.4–52.5) |
| Nitrates | 6 | 36.7 (24.1–51.5) |
| Antiplatelet (without specification) | 14 | 75.1 (55.5–87.9) |
| Clopidogrel | 13 | 50.0 (22.9–78.1) |
| Dual antiplatelet therapy | 3 | 80.0 (55.3–92.8) |
| Lipid-lowering drugs (without specification) | 2 | 34.4 (9,1–73.4) |
| High-intensity statins | 2 | 24.1 (6.4-59.8) |
| Fibrates | 2 | 73.1 (69.5–76.5) |

Figure 5
Pooled prevalence of statins.

Figure 6
Time trends in medication use.
Each circle represents a study and the size of the circle is proportional to the number of participants in the study.
Table 3
Results of the meta-regression models showing factors independently associated with medication use.
Results are expressed in odds ratios and 95% confidence intervals. Sex was treated as a numerical variable (percentage of women included in the study). The reference category for setting was ‘Academic/Tertiary Hospital,’ and the reference category for diagnosis was ‘coronary heart disease.’ Abbreviations: acute coronary syndrome (ACS), coronary artery bypass graft (CABG), coronary heart disease (CHD), percutaneous coronary intervention (PCI percutaneous coronary intervention). *p = 0.05.
| VARIABLE | BETA-BLOCKERS | ACEI ARB | STATIN | ANTIPLATELET DRUGS (OVERALL) | ASPIRIN |
|---|---|---|---|---|---|
| Intercept | 2.56 (0.89–7.37)* | 0.84 (0.36–1.94) | 3.55 (1.04–12.17) | 6.57 (2.60–16.57)* | 6.06 (2.18–16.87) * |
| Sex | 1.01 (0.98–1.04) | 1.01 (0.98–1.04) | 1.01 (0.97–1.04) | 1.00 (0.97–1.03) | 1.00 (0.97–1.03) |
| Setting | |||||
| Primary care/community | 0.18 (0.04–0.96) * | 0.11 (0.02–0.62)* | 0.12 (0.03–0.40)* | 0.19 (0.04–0.96) * | |
| Public centre | 0.35 (0.07–1.69) | 0.28 (0.09–0.86)* | |||
| Cardiac rehabilitation | 0.92 (0.30–2.78) | 1.87 (0.53–6.61) | 0.38 (0.14 – 1.04) | 0.07 (0.02–0.33) * | |
| Other | 0.71 (0.27–1.88) | 0.67 (0.27–1.64) | 0.73 (0.37–1.44) | 1.03 (0.36–2.92) | |
| Diagnosis | |||||
| ACS | 1.41 (0.78–2.54) | 1.65 (0.90–3.03) | 1.73 (0.89–3.37) | ||
| PCI | 0.70 (0.21–2.28) | 0.92 (0.30 – 2.82) | 0.94 (0.29–3.08) | ||
| CABG | 1.21 (0.43–3.37) | 0.85 (0.27 – 2.65) | |||
| CABG, PCI | 0.58 (0.11–2.97) | 1.26 (0.38 –4.21) | 1.31 (0.37–4.64) | ||
