Table 2 Mann-Whitney tests: Comparisons of completers and non-completers

Mdn (Interquartile range)

Mean rank

Mdn (Interquartile range)

Mean rank

U

p

Demographic

Age in years

25.00

(22.00-29.00)

226.84

24.00

(20.00-27.00)

197.03

17479.5

.010*

Age first started using drugs

18.00

(16.00-20.00)

225.67

17.00

(16.00-19.00)

199.61

17830.5

.040*

Years of education

12.00

(11.00-13.00)

215.65

11.00

(11.00-13.00)

221.55

19713.0

.635

Other factors

Counseling Rapport

43.00

(38.00-51.00)

255.29

36.00

(30.00-41.50)

134.69

9001.5

.0001***

Treatment Perceptions

32.00

(30.00-35.00)

253.90

24.00

(22.00-28.00)

137.74

9416.0

.0001***

Anxiety

40.00

(40.00-44.29)

233.14

40.00

(34.29-40.00)

183.22

15602.5

.0001***

Treatment Readiness

32.50

(30.00-37.50)

231.72

30.00

(30.00-35.00)

186.34

16026.0

.0001***

Social Support

37.78

(35.56-40.00)

231.65

37.77

(33.33-37.77)

186.50

16047.5

.0001***

Problem Recognition

37.78

(35.56-41.11)

230.18

37.78

(33.89-37.78)

189.72

16486.0

.001**

Desire for Help

40.00

(37.14-42.86)

229.61

38.57

(34.29-40.00)

190.97

16656.0

.001**

Depression

40.00

(36.67-41.67)

228.46

40.00

(31.66-40.00)

193.48

16997.0

.006**

Total (N)

298

136