Methods | Statistic methods | Results | |
---|---|---|---|

Reliability | |||

1. Internal consistency | Cronbach’s method Corrected item-total correlation | Cronbach’s alpha statistic Pearson moment-product correlation coefficient | Alpha of scale = 0.86 Corrected item-total correlation = 0.60–0.74 |

2. Stability | 2-week test-retest reliability ^{a} | Intraclass correlation coefficient (ICC) | r = 0.78, p < 0.00195% CI: 0.63–0.88 |

Validity | |||

1. Face validity | Review by target population ^{b} | Frequency & percentage | 100% comprehensibility and interpretability |

2. Content validity | Review by expert panel | Content validity index (CVI) | I-CVI = 0.80–1.00, S-CVI = 0.93 |

3. Construct validity 1. | Factor analysis | Exploratory factor analysis ^{c} | KMO = 0.809 Bartlett’s Test of Sphericity: χ ^{2} = 777.25, p < 0.001Total variance explained = 65.84% Item loadings = 0.69–0.85 |

Confirmatory factor analysis ^{d} | χ^{2}/d.f. = 2.26, CFI = 0.99, NFI = 0.99, IFI = 0.99, RMSEA = 0.049 (First-order one-factor CFA model) |