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Table 2 Distribution of study participants according to the primary questionnaire and physical examination case definitions (n = 187)

From: Agreement between a self-administered questionnaire on musculoskeletal disorders of the neck-shoulder region and a physical examination

  Physical examination
   + -  
   N (expected value) N (expected value)  
Questionnaire + 67 (46) 18 (39) 85
  - 35 (56) 67 (46) 102
   102 85 187
  1. Global agreement = 72%
  2. Kappa value = 0.44, 95% C.I. = 0.31–0.56
  3. Agreement among questionnaire cases = 79%
  4. Agreement among questionnaire non-cases = 66%