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Table 2 Dimension, score, class and domain of WAI of older workers

From: Work ability of Thai older Workers in Southern Thailand: a comparison of formal and informal sectors

Items Formal (n = 71) Informal (n = 253) p
Dimension of work ability: mean (SD)
 1) Current work ability compared with the lifetime best 7.9 (1.4) 7.5 (1.6) 0.016a
 2) Work ability in relation to the demands of the job 8.7 (1.4) 7.8 (1.6) < 0.001a
 3) Numbers of current diseases diagnosed by a physician 5.7 (1.7) 5.3 (1.7) 0.028a
 4) Estimated work impairment due to diseases 4.5 (1.4) 4.1 (1.8) 0.022a
 5) Sick leave during the past year (12 months) 4.6 (0.6) 4.5 (0.8) 0.019a
 6) Personal prognosis of work ability 2 years from now 5.6 (1.6) 5.1 (1.6) 0.004a
 7) Mental resources 3.4 (0.6) 3.3 (0.7) 0.023a
Total work ability index score: mean (SD) 40.6 (4.6) 37.5 (5.0) < 0.001a
Class of work ability: n (%)
 Good - Excellent 58 (81.7) 158 (62.5) 0.002b
 Poor - Moderate 13 (18.3) 95 (37.5)  
Three domains according to the purpose of WAI: n (%)
 Perception of work ability    < 0.001b
  Weak 25 (35.2) 145 (57.3)  
 Strong 46 (64.8) 108 (42.7)  
 Health status    < 0.001b
  Bad 31 (43.7) 166 (65.6)  
  good 40 (56.3) 87 (34.4)  
 Mental resources    0.228b
  Weak 35 (49.3) 158 (62.5)  
  Strong 36 (50.7) 195 (37.5)  
  1. a Independent t-test, b Pearson’s chi-squared test