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Table 1 Standardized factor loadings of the 6-items of the depressive symptoms scale

From: Measurement invariance of the depressive symptoms scale during adolescence

  Single-factor model Two-factor model Three-factor model
Items I I II I II III
1. Felt too tired to do things .37/.63/.66 .54/.74/.81   .54/.74/.82   
2. Had trouble going to sleep or staying asleep .35/.60/.57 .50/.70/.69   .51/.71/.70   
3. Felt unhappy, sad, or depressed .62/.81/81   .62/.81/.81   .68/.87/.87  
4. Felt hopeless about the future .60/.76/.71   .60/.77/.72   .66/.81/.75  
5. Felt nervous or tense .58/.73/.82   .59/.73/.82    .70/.78/.84
6. Worried too much about things .74/.81/.86   .75/.81/.87    .81/.88/.90
  1. Note. First, second, and third factor loadings correspond to Time 1, 2, and 3, respectively.