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Table 2 Details of questionnaire sampling by risk level

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

Prism risk level (default score range) Proportion of sample % Sample (number of patients) for screening in each practice
Level 4 (50 to 100) 20 15
Level 3 (20 to 50) 50 35
Level 2 (10 to 20) 15 10
Level 1 (0 to 10) 15 10
Total sample 100 70