CRP and pulmonary arterial hypertension: Raised CRP (OR 1.3, 95% CI 1.1–1.6, p < 0.01) and worsening dyspnoea (OR 1.3, 95% CI 1.1–1.6, p < 0.01) were associated with worsening in HAQ-DI scores, as was PAH (OR 1.3, 95% CI 1.0–1.6, p = 0.08) although not meeting statistical significance.