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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