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Table 7 Relationship between reading written IC with age and education level of patients and Mantel-Haenszel test (M.H)

From: Does written informed consent adequately inform surgical patients? A cross sectional study

   Yes/Total Reading %
Age >  60 50/155 32.2
≤ 60 194/316 61.4
Total 244/471 51.8
OR = 3.33 (CI 95%: 2.22–5.01) p = 0.000
Education < High School 102/247 41.3
≥ High School 142/224 63.4
Total 244/471 51.8
OR = 2.46 (CI: 1.70–3.57) p = 0.000
Mantel-Haenszel test
Age > 60 Education   
< High School 30/112 26.8
≥ High School 20/43 46.5
Total 50/155 32.3
OR = 2.37 (CI 95%: 1.14–4.92) p = 0.001
Age ≤ 60 Education   
< High School 72/135 53.3
≥ High School 122/181 67.4
Total 194/316 61.4
OR = 1.81 (CI 95%: 1.14–2.86) p = 0.001
  1. M.H. test stratified for age OR = 1.94 (C.I.1.32–2.90) p = 0.001