(A) Cronbach’s alpha value of the survey | |||

Subscale (factor) | No of Items | Cronbach’s alpha | |

Depression | 3, 5, 10, 13, 16, 17, 21 (DQ1–DQ7) | 0.830 | |

Anxiety | 2,4,7,9,15,19,20 (AQ1–AQ7) | 0.656 | |

Stress | 1,6,8,11,12,14,18 (SQ1–SQ7) | 0.876 | |

Overall | 1–21 | 0.915 | |

(B) KMO and Bartlett’s test | |||

KMO measure of sampling adequacy | 0.838 | ||

Bartlett’s test of sphericity | Approximate χ^{2} | 1914.511 | |

Degrees of freedom | 210 | ||

Significance | 0.000 | ||

(C) Inter-item correlation matrix | |||

DASS-D score | DASS-A score | DASS-S score | |

Depression | 1000 | ||

Anxiety | 0.596* | 1000 | |

Stress | 0.754* | 0.668* | 1000 |

*Correlation is significant at the 0.01 level (2-tailed)

DASS-21, Depression–Anxiety–Stress Scales-21; KMO, Kaiser-Meyer-Olkin.