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Table 2 Validity of assessment of balding group by age, ethnicity and education.

From: Validity of self reported male balding patterns in epidemiological studies

  Observer 1 vs subjects Observer 2 versus subjects
  % agreement κ (p) % agreement κ (p)
Age group     
   <50 years 65.2 0.46(<0.001) 72.5 0.56(p < 0.001)
   >50 years 73.5 0.62(<0.001) 76.5 0.66(p < 0.001)
Education     
   Junior high school 46.2 0.29 (p = 0.058) 61.5 0.48 (p = 0.003)
   Senior high school 91.3 0.86 (p < 0.001) 87.0 0.79 (p < 0.001)
   Trade school 64.5 0.46 (p < 0.001) 74.2 0.58 (p < 0.001)
   Undergraduate 70.0 - 70.0 -
   Postgraduate 56.2 0.37 (p = 0.013) 68.7 0.57 (p < 0.001)
Ethnicity     
   "Australian" 66.7 0.50 (p < 0.001) 75.0 0.61 (p < 0.001)
   Other 71.0 0.57 (p < 0.001) 71.0 0.57 (P < 0.001)