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Table 4 Determination of cutpoints for the ADL scales

From: Simulation study of activities of daily living functions using online computerized adaptive testing

Estimation methods & scales Strata Cutpoints
Characteristics n IRT-score T-score Specificity Sensitivity
MAP Male ADL Not Active 285     
Fairly Active 385 −0.66 43.40 0.96 0.96
Active 249 0.46 54.60 0.93 0.94
Very Active 81 1.51 65.10 0.94 0.93
Female ADL Not Active 279     
Fairly Active 383 −0.65 43.50 0.96 0.96
Active 282 0.49 54.90 0.94 0.94
Very Active 56 1.65 66.50 0.96 0.96
CADL Not Active 292     
Fairly Active 382 −0.86 41.40 0.97 0.97
Active 277 0.60 56.00 0.94 0.94
Very Active 49 1.9 69.00 0.94 0.94
EAP Male ADL Not Active 285     
Fairly Active 344 −0.64 43.60 0.96 0.96
Active 256 0.34 53.40 0.92 0.92
Very Active 115 1.21 62.10 0.91 0.91
Female ADL Not Active 285     
Fairly Active 345 −0.62 43.80 0.96 0.96
Active 266 0.37 53.70 0.92 0.92
Very Active 104 1.28 62.80 0.93 0.93
CADL Not Active 279     
Fairly Active 383 −0.65 43.50 0.96 0.96
Active 282 0.49 54.90 0.94 0.94
Very Active 56 1.65 66.50 0.96 0.96
MLE Male ADL Not Active 285     
Fairly Active 385 −0.66 43.40 0.96 0.96
Active 249 0.46 54.60 0.93 0.94
Very Active 81 1.51 65.10 0.94 0.93
Female ADL Not Active 279     
Fairly Active 383 −0.65 43.50 0.96 0.96
Active 282 0.49 54.90 0.94 0.94
Very Active 56 1.65 66.50 0.96 0.96
CADL Not Active 289     
Fairly Active 382 −0.86 41.40 0.97 0.97
Active 277 0.58 55.80 0.94 0.94
Very Active 52 1.88 68.80 0.94 0.94
  1. IRT Item response theory, ADL-CAT activities of daily living-Computerized Adaptive Testing, CADL comprehensive activities of daily living-Computerized Adaptive Testing, MLE maximum likelihood estimation, EAP, expected a posteriori estimation, MAP, maximum a posteriori estimation
  2. T-score cutpoints suggested at 45, 55, 65 for ADL scales