نبذة مختصرة : Background Outcomes derived from longitudinal self-reported health-related quality of life measures can be confounded by response shift. This study was aimed to detect response shift among patients with hypertension attending a community-based disease management program. Methods 240 consecutive consulting or follow-up patients with diagnosed hypertension were recruited. The Short Form 36-item Health Survey was self-administered at 12 community health service stations at baseline and four weeks after attending the program. The 4-step structural equation modeling approach assessed response shift. Results Data from 203 (84.6%) patients were eligible for analyses (mean age 65.9 ± 10.8 years, 46.3% female). The results showed uniform recalibration of social functioning ($${\upchi}_{\mathrm{SBdiff}}^{2}$$ χ SBdiff 2 (1) = 22.98, P $${\upchi}_{\mathrm{SBdiff}}^{2}$$ χ SBdiff 2 (1) = 8.84, P = 0.003), and bodily pain ($${\upchi}_{\mathrm{SBdiff}}^{2}$$ χ SBdiff 2 (1) = 17.41, P Conclusions Recalibration existed among patients with hypertension attending the disease management program. The interventions in the program might act as a catalyst that induced the response shift. We conclude that response shift should be considered in hypertension research with longitudinal health-related quality of life data.
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