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Table 6 Ranking of the 10 items in “Kessler’s Scale”

From: Patients’ perceptions of orthodontic treatment experiences during COVID-19: a cross-sectional study

K10 all items

Mean

SD

25%

Median

75%

Complete observations

Did you feel tired for no good reason?

1.44

0.95

1

1

1

132 (86%)

Did you feel nervous

1.55

0.95

1

1

2

132 (86%)

Did you feel so nervous that nothing could calm you down

1.30

0.78

1

1

1

128 (83%)

Did you feel that everything was an effort

1.63

1.22

1

1

2

129 (84%)

Did you feel sad that nothing could cheer you up

1.24

0.77

1

1

1

132 (86%)

Did you feel worthless?

1.20

0.69

1

1

1

133 (86%)

Did you feel restless or fidgety

1.41

0.90

1

1

1

133 (86%)

Did you feel so restless that you could not sit still

1.23

0.64

1

1

1

132 (86%)

Did you feel depressed?

1.35

0.89

1

1

1

133 (86%)

Did you feel hopeless?

1.20

0.67

1

1

1

132 (86%)

Total

13.16

6.63

10

10

13

121 (79%)