pre

post

Two-way repeated measures analysis of variance

Analysis of co-variance for age

Main effects

(before & after）

Main effects

(group)

Reciprocal action

Reciprocal action

Average value

Standard deviation

Average value

Standard deviation

F

P

F

P

F

P

partial η²

F

P

partial η²

KTSND

Intervention group

17.08

5.82

13.81

6.06

1.96

0.17

2.31

0.14

6.95

0.01*

0.15

0.10

0.75

0.00

Control group

17.94

7.52

18.94

8.12

Motivation for smoking

Intervention group

5.70

3.45

7.16

2.65

6.10

0.02 *

2.09

0.16

2.33

0.18

0.06

4.07

0.05

0.09

Control group

4.91

3.18

5.25

3.44

Confidence in quitting smoking

Intervention group

2.89

3.00

4.95

2.93

2.59

0.12

0.32

0.57

9.05

0.01*

0.19

4.47

0.04*

0.11

Control group

3.75

3.01

3.13

3.17

Confidence to cope with smoking temptation

Intervention group

3.55

3.87

4.80

2.86

0.27

0.60

4.43

0.04 *

3.63

0.06

0.09

0.94

0.33

0.03

Control group

2.77

2.78

2.06

2.44