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Table 1 Demographic characteristics of the participants and properties of the distributions of WHODAS 2.0 summary scores by country

From: Why sample selection matters in exploratory factor analysis: implications for the 12-item World Health Organization Disability Assessment Schedule 2.0

  China India Mexico Russian Federation South Africa Ghana
Sample size (N)a 12,226 6,095 2,041 3,305 3,461 4,123
Demographic characteristics
 Female sex 53% 49% 60% 64% 58% 47%
 Age – mean (standard deviation) 63(9) 62(9) 68(9) 64(10) 63(10) 64(11)
WHODAS 2.0 Score Distributionb
 25th/50th/75th percentiles 0/2/5 5/10/16 2/5/12 3/6/12 0/5/13 2/8/15
 Mean scores (standard deviation) 3.52(5.24) 11.43(8.61) 7.79(8.18) 8.28(7.74) 8.01(8.76) 9.46(8.56)
 Skewness (standard error) 2.82(.02) 0.97(.03) 1.48(.05) 1.45(.04) 1.23(.04) 1.07(.04)
 Percentage of participants with zero scores 32% 6% 16% 7% 26% 15%
  1. Note. aOnly adults aged 50+ with no missing value in WHODAS items responses were included
  2. b12-item WHODAS 2.0 summary scores (calculated as the sum of item scores) can range from 0 to 48, with higher scores indicating greater activity limitations and participation restrictions