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Table 2 Comparison of baseline variables (S.D) of drop-outs vs. completers

From: Drop-out and mood improvement: a randomised controlled trial with light exposure and physical exercise [ISRCTN36478292]

       

Analysis of variance

   

Variable

    

Treatment group

 

Dropout group

 

Interaction

 
 

All

Exercise&Light

Exercise

Light

F

p

F

p

F

p

Age

    

.50

.61

2.33

.13

2.20

.12

Drop-outs

39.5 (8.2)

41.3 (7.2)

35.4 (7.2)

43.4 (9.6)

      

Completers

43.4 (9.6)

41.8 (9.2)

45.5 (10.2)

43.2 (9.3)

      

GSS

    

1.35

.26

5.40

.02

.98

.38

Drop-outs

13.1 (4.5)

13.0 (5.0)

11.1 (3.3)

15.8 (4.5)

      

Completers

10.5 (4.9)

10.1 (5.2)

10.5 (4.6)

10.9 (5.1)

      

HDRS

    

4.38

.02

4.00

.05

1.55

.22

Drop-outs

13.6 (8.4)

16.3 (10.9)

8.29 (3.9)

16.6 (5.6)

      

Completers

10.5 (6.4)

10.8 (7.0)

9.00 (5.2)

11.4 (6.6)

      

ATYP*

    

1.18

.31

2.42

.12

.23

.79

Drop-outs

7.45 (5.3)

7.50 (5.4)

6.14 (5.0)

9.20 (6.0)

      

Completers

5.92 (4.3)

6.22 (4.9)

5.07 (3.7)

6.32 (4.2)

      

BMI**

    

.30

.74

1.88

.17

1.33

.27

Drop-outs

25.5 (4.9)

27.0 (6.2)

24.9 (4.5)

24.4 (3.8)

      

Completers

24.2 (3.7)

23.6 (3.1)

24.1 (3.6)

24.7 (4.3)

      

Sessions attended (%)

    

2.70

.07

143

.000

2.29

.11

Drop-outs

32.5 (24.4)

25.8 (20.6)

30.6 (24.9)

48.0(27.2)

      

Completers

82.1 (14.4)

82.7 (14.4)

80.5 (15.2)

82.9(14.1)

      

Fitness

    

2.61

.11

11.1

.001

7.82

.007

Drop-outs

93.3 (14.3)

83.7 (11.3)

99.1 (13.0)

----

      

Completers

103.2 (12.1)

105.1 (13.6)

101.0 (10.2)

---

      

BNSQ

          

Initial insomnia

    

3.00

.06

6.00

.02

5.43

.006

Drop-outs

2.61 (1.2)

3.50 (.84)

2.14 (1.1)

2.20 (1.3)

      

Completers

2.06 (.93)

1.84 (.81)

1.83 (.93)

2.43 (.93)

      

Middle insomnia

    

1.91

.15

.23

.64

1.34

.27

Drop-outs

3.21 (1.4)

3.57 (1.4)

2.43 (1.1)

3.80 (1.6)

      

Completers

3.11 (1.3)

3.10 (1.3)

3.03 (1.3)

3.19 (1.4)

      

Late insomnia

    

2.97

.06

.55

.46

1.15

.32

Drop-outs

1.68 (.95)

1.86 (1.1)

1.14 (.38)

2.20 (1.1)

      

Completers

1.92 (.92)

1.78 (.83)

1.79 (.90)

2.14 (.98)

      

Quality of sleep

    

1.615

.20

.10

.753

.70

.50

Drop-outs

2.47 (1.1)

2.86 (1.2)

2.00 (0.0)

2.60 (1.3)

      

Completers

2.42 (1.1)

2.34 (1.0)

2.21 (1.0)

2.65 (1.2)

      

Alcohol consumption

    

.079

.92

.31

.58

.098

.91

Drop-outs

6.05 (5.6)

5.63 (6.3)

6.57 (6.7)

6.00 (3.4)

      

Completers

5.34 (5.5)

5.00 (4.4)

4.97 (5.9)

5.92 (6.0)

      
  1. *ATYP – atypical symptom score ** BMI – Body Mass Index Alcohol consumption – drinks per week