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Table 1 Happiness index scale (HIS)

From: The reliability, validity and screening effect of the happiness index scale among inpatients in a general hospital

Items PCA Score
Loading never a few days more than half the days almost every day
Factor 1: Depression trend
 HIS-1 (PHQ-1): Little interest or pleasure in doing things 0.879 0 1 2 3
 HIS-2 (PHQ-2): Feels down, depressed, or hopeless 0.811 0 1 2 3
Factor 2: Degree of anxiety
 HIS-3 (GAD-3): Worries too much about different things 0.822 0 1 2 3
 HIS-4 (GAD-6): Becomes easily annoyed or irritable 0.854 0 1 2 3
Factor 3: Sleep quality
 HIS-5 (AIS-4): Total sleep time 0.913 0 1 2 3
 HIS-6 (AIS-5): Total sleep quality (no matter how long you sleep 0.902 0 1 2 3
   no yes
Factor 4: Suicidal tendency    
 HIS-7 (C-SSRS-2): Do you actually have some thoughts about suicide? 0.921 0 1
 HIS-8 (C-SSRS-3): Have you been thinking about how to kill yourself? 0.930 0 3
  1. HIS actual score = 0.203 × HIS1 + 0.169 × HIS2 + 0.143 × HIS3 + 0.177 × HIS4 + 0.297 × HIS5 + 0.326 × HIS6 + 1.021 × HIS7 + 0.427 × HIS8