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Table 3 Results of linear mixed model analyses over t1- t2- t3; t1-t2 and t2-t3

From: Reducing Khat use among Somalis living in Kenya: a controlled pilot study on the modified ASSIST-linked brief intervention delivered in the community

original

matched

Quantity (bundles)

t

 

df

F

p

t

 

df

F

p

1-2-3

g

1, 332.63

8.66

.003

1-2-3

g

1, 317.21

3.31

.070

t

1, 325.40

26.26

<.001

t

1, 308.48

24.89

<.001

g x t

1, 325.40

8.23

.004

g x t

1, 308.48

4.77

.030

1–2

g

1, 331.06

9.70

.002

1–2

g

1, 317.66

4.89

.028

t

1, 302.73

10.26

.002

t

1, 290.29

12.01

.001

g x t

1, 302.73

6.73

.010

g x t

1, 290.29

5.40

.021

2–3

g

1, 297.13

.01

.975

2–3

g

1, 283.67

.28

.599

t

1, 295.79

3.85

.051

t

1, 281.99

2.16

.142

g x t

1, 295.79

.01

.935

g x t

1, 281.99

.10

.753

Frequency (days)

t

 

df

F

p

t

 

df

F

p

1-2-3

g

1, 329.19

3.49

.063

1-2-3

g

1, 313.69

1.81

.180

t

1, 320.51

58.93

<.001

t

1, 305.93

54.16

<.001

g x t

1, 320.51

7.16

.008

g x t

1, 305.93

5.66

.018

1–2

g

1, 323.68

7.86

.005

1–2

g

1, 306.74

5.81

.017

t

1, 304.83

70.94

<.001

t

1, 290.10

73.35

<.001

g x t

1, 304.83

12.62

<.001

g x t

1, 290.10

11.76

.001

2–3

g

1, 281.30

1.49

.223

2–3

g

1, 269.38

2.32

.129

t

1, 277.32

.03

.860

t

1, 264.35

.07

.788

g x t

1, 277.32

.34

.560

g x t

1, 264.35

.60

.440

  1. t = time: 1-2-3 = analysis over all 3 time points of assessment, 1–2 = analysis over time point 1 and 2, 2–3 = analysis over time point 2 and 3; df = degrees of freedom; F = F-value; p = p-value; g = main effect for group; t = main effect for time; g x t = interaction effect time x groupÂ