Participants
GROUP B
A total of 503 (Group A = 241, Group B = 262) patients were contacted (the entire PIKKO intervention group). Of these, n = 356 returned a completed questionnaire of supplementary survey (n
Flow chart of the supplementary surveyFor unknown reasons 147 patients did not respond and could not be interviewed again in the main PIKKO study (126/147, 85.7%). Others were deceased (9/147, 6.1%), withdrew for health reasons (2/147, 1.4%), or completed the PIKKO surveys but no longer responded (10/147, 6.8%).