Comprehensive Comparative Effectiveness and Safety of First-Line Antihypertensive Drug Classes: A Systematic, Multinational, Large-Scale Analysis

Lancet. 2019 Nov 16;394(10211):1816-1826. doi: 10.1016/S0140-6736(19)32317-7. Epub 2019 Oct 24.

Abstract

Background: Uncertainty remains about the optimal monotherapy for hypertension, with current guidelines recommending any primary agent among the first-line drug classes thiazide or thiazide-like diuretics, angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, dihydropyridine calcium channel blockers, and non-dihydropyridine calcium channel blockers, in the absence of comorbid indications. Randomised trials have not further refined this choice.

Methods: We developed a comprehensive framework for real-world evidence that enables comparative effectiveness and safety evaluation across many drugs and outcomes from observational data encompassing millions of patients, while minimising inherent bias. Using this framework, we did a systematic, large-scale study under a new-user cohort design to estimate the relative risks of three primary (acute myocardial infarction, hospitalisation for heart failure, and stroke) and six secondary effectiveness and 46 safety outcomes comparing all first-line classes across a global network of six administrative claims and three electronic health record databases. The framework addressed residual confounding, publication bias, and p-hacking using large-scale propensity adjustment, a large set of control outcomes, and full disclosure of hypotheses tested.

Findings: Using 4·9 million patients, we generated 22 000 calibrated, propensity-score-adjusted hazard ratios (HRs) comparing all classes and outcomes across databases. Most estimates revealed no effectiveness differences between classes; however, thiazide or thiazide-like diuretics showed better primary effectiveness than angiotensin-converting enzyme inhibitors: acute myocardial infarction (HR 0·84, 95% CI 0·75-0·95), hospitalisation for heart failure (0·83, 0·74-0·95), and stroke (0·83, 0·74-0·95) risk while on initial treatment. Safety profiles also favoured thiazide or thiazide-like diuretics over angiotensin-converting enzyme inhibitors. The non-dihydropyridine calcium channel blockers were significantly inferior to the other four classes.

Interpretation: This comprehensive framework introduces a new way of doing observational health-care science at scale. The approach supports equivalence between drug classes for initiating monotherapy for hypertension-in keeping with current guidelines, with the exception of thiazide or thiazide-like diuretics superiority to angiotensin-converting enzyme inhibitors and the inferiority of non-dihydropyridine calcium channel blockers.

Funding: US National Science Foundation, US National Institutes of Health, Janssen Research & Development, IQVIA, South Korean Ministry of Health & Welfare, Australian National Health and Medical Research Council.

Publication types

  • Meta-Analysis
  • Multicenter Study

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Angiotensin Receptor Antagonists / adverse effects
  • Angiotensin Receptor Antagonists / therapeutic use
  • Angiotensin-Converting Enzyme Inhibitors / adverse effects
  • Angiotensin-Converting Enzyme Inhibitors / therapeutic use
  • Antihypertensive Agents / adverse effects
  • Antihypertensive Agents / therapeutic use*
  • Calcium Channel Blockers / adverse effects
  • Calcium Channel Blockers / therapeutic use
  • Child
  • Cohort Studies
  • Comparative Effectiveness Research / methods
  • Databases, Factual
  • Diuretics / adverse effects
  • Diuretics / therapeutic use
  • Evidence-Based Medicine / methods
  • Female
  • Heart Failure / etiology
  • Heart Failure / prevention & control
  • Humans
  • Hypertension / complications
  • Hypertension / drug therapy*
  • Male
  • Middle Aged
  • Myocardial Infarction / etiology
  • Myocardial Infarction / prevention & control
  • Stroke / etiology
  • Stroke / prevention & control
  • Young Adult

Substances

  • Angiotensin Receptor Antagonists
  • Angiotensin-Converting Enzyme Inhibitors
  • Antihypertensive Agents
  • Calcium Channel Blockers
  • Diuretics