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Table 1 Demographic characteristics of invited, non-respondent and respondent samples

From: Statin prescription initiation and lifestyle behaviour: a primary care cohort study

  Invited Sample (n = 384) Non-respondent sample (n = 275) Respondent Sample (n = 109)
Age range 33 – 91 years 33–91 years Min 38 – 84 years
Mean age (SD) 63 years (SD 11.9) 63 year (SD 11.1) 64 years (SD 10.3)
Sex: Male n = 177 (46 %) n = 127 (46.2) n = 50 (45.9 %)
Female n = 207 (54 %) n = 148 (53.8) n = 59 (54.1 %)
Deprivation ranka:    
Quartile 1 (most deprived) 157 (40.9 %) 120 (43.6 %) 37 (34.0 %)
Quartile 2 54 (14.1 %) 37 (13.5 %) 17 (15.6 %)
Quartile 3 77 (20.2 %) 57 (20.7 %) 20 (18.4 %)
Quartile 4 (least deprived) 96 (25.0 %) 61 (22.2 %) 35 (32.1 %)
High blood pressure Not known Not known 76 (69.7 %)
Angina Not known Not known 22 (20.2 %)
Myocardial infarction Not known Not known 12 (11.0 %)
Stroke Not known Not known 8 (7.3 %)
Diabetes mellitus Not known Not known 17 (15.6 %)
No cardiovascular morbidity Not known Not known 22 (20.2 %)
Current smoker Not known Not known 24 (22.0 %)
Ex-smoker Not known Not known 29 (26.6 %)
  1. aDeprivation rank (grouped in quartiles) based on Northern Ireland Multiple Deprivation Index, linked to address postcode (Northern Ireland Multiple Deprivation Measure 2010, Northern Ireland Statistics and Research Agency, http://www.nisra.gov.uk/deprivation/nimdm_2010)