Assessment of pain
’, Pain, pain
SECONDARY
Pain was measured by the Pain Impact Questionnaire (PIQ-6) in surveys administered 1, 2, and 5 years after enrollment. The PIQ-6 is a validated self-administered brief questionnaire which asks about bodily pain and its impact on everyday activities in the last 4 weeksThe PIQ-6 score, treated as a continuous variable, was the primary outcome in this analysis. We estimated, based on results from the ViDA TrialWe included two secondary outcomes. Firstly, we categorised PIQ-6 scores into two groups: ‘little or no pain impact’ (PIQ-6 ≤ 50) and ‘some or more pain impact’ (PIQ-6 > 50)