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. 2020 Nov 11;20:533. doi: 10.1186/s12888-020-02910-8

Table 5.

Item-Total Statistics of GDS-15

Items in GDS15 Scale Mean if Item Deleted Scale Variance if Item Deleted Corrected Item-Total Correlation Cronbach’s Alpha if Item Deleted
Item 1a 4.2652 7.239 .427 .689
Item 2 4.2545 7.478 .292 .703
Item 3a 4.1004 6.889 .453 .682
Item 4a 3.9283 6.973 .381 .692
Item 5 4.2867 7.421 .359 .696
Item 6 4.0215 7.000 .380 .692
Item 7a 4.1685 7.112 .394 .691
Item 8 4.3011 7.449 .366 .696
Item 9b 4.2222 7.735 .147 .718
Item 10 3.8674 7.274 .265 .707
Item 11b 4.3978 8.053 .146 .714
Item 12 4.1470 7.183 .349 .696
Item 13b 3.8387 7.481 .189 .717
Item 14a 4.0430 6.905 .425 .686
Item 15b 4.1792 7.565 .200 .713

aItems of GDS-15 resulting in a “decrease” in the alpha if deleted (items for new GDS-5),

bItems of GDS-15 resulting in an “increase” in the alpha if deleted