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Table 1 Overview of methods employed in the study, matched to study objectives

From: Predictive risk stratification model: a progressive cluster-randomised trial in chronic conditions management (PRISMATIC) research protocol

Objective Data source Sample Collection time
1. Measure changes in the profile of services delivered to patients across the spectrum of risk, focussing on emergency admissions to hospital Anonymised routine linked data (including Prism data) All patients from participating practices Baseline
6 months
18 months
Questionnaire data: Client Services Receipt Inventory (CSRI) Random sample of patients from participating practices (n = 800 at each time point) Baseline
6 months
18 months
2. Estimate the costs of implementing Prism and costs of resulting changes in the utilisation of health and social care resources Questionnaire data: Client Services Receipt Inventory (CSRI); SF12 Random sample of patients from participating practices (n = 800 at each time point) Baseline
6 months
18 months
Structured telephone interviews Prism users from all participating practices (n = up to 40) 18 months
3. Assess the cost effectiveness of Prism by estimating cost per quality-adjusted life year based on changes in patient health outcomes Questionnaire data: SF12 Random sample of patients from participating practices (n = 800 at each time point) Baseline
6 months
18 months
Structured telephone interviews Prism users from all participating practices 18 months
4. Describe processes of change associated with Prism: how it is understood, communicated, adopted and used by practitioners, managers, local commissioners and policy makers Focus groups GPs, practice nurses and managers from participating practices (n = 4); local health services managers and community staff managers (n = 1) Baseline
Interviews GPs from participating practices who are unable to attend FGs (n = 12); Baseline
health board managers from sites not participating in main study (n = 6); policy makers and national health service managers (n = 5)
Interviews Prism users from half of all participating practices, purposively sampled 3 months and 9 months after going live
Questionnaire Prism users from remaining half of all participating practices 3 months and 9 months after going live
Focus group Local health services managers and community staff managers (n = 1) 18 months
Interviews Health service managers from ABMU (n = 3) 18 months
Structured telephone interviews Prism users from all participating practices (n = up to 40) 18 months
5. Assess the effect of Prism on patient satisfaction Questionnaire data: Quality of Care Monitor Random sample of patients from participating practices (n = 800 at each time point) Baseline
6 months
18 months
6. Assess the technical performance of Prism Prism data Prism risk data for patients at participating practices Baseline
6 months
18 months
Anonymised routine linked data Routine health data Baseline
6 months
18 months
  Structured telephone interviews Prism users from all participating practices (up to 40) 18 months