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Table 6 Change in primary outcomes for various periods of the study for participants who dropped out early (0 or 1 week) and for those who received full treatment (12 weeks).

From: Are alcoholism treatments effective? The Project MATCH data

Total Improvement

     
 

Percent days abstinent

     
  

Group

Pretreatment

Follow-up

t=

df

p=

Effect

  

0

33

72

1.95

85

.000

1.498

  

1

29

64

9.30

105

.000

1.320

  

12

30

86

31.74

354

.000

2.042

 

Drinks per drinking day

     
  

0

17.9

7.3

1.75

85

.000

1.534

  

1

22.8

7.6

11.99

105

.000

1.552

  

12

15.7

3.2

34.68

354

.000

2.494

Instantaneous Improvement (week 1)

     
 

Percent days abstinent

     
  

Group

Pretreatment

Week 1

t=

df

p=

Effect

  

0

32

81

9.17

56

.000

1.981

  

1

30

69

8.43

87

.000

1.447

  

12

30

92

35.30

339

.000

2.317

 

Drinks per drinking day

     
  

0

18.7

3.8

1.75

56

.000

2.097

  

1

22.5

8.7

9.69

87

.000

1.770

  

12

15.6

1.5

35.28

339

.000

2.909

Acute Treatment Phase (weeks 1 & 12)

     
 

Percent days abstinent

     
  

Group

Week 1

Week 12

t=

df

p=

Effect

  

0

81

81

.19

56

.852

-.025

  

1

69

63

1.69

87

.098

-.174

  

12

92

96

2.82

339

.005

.155

 

Drinks per drinking day

     
  

0

3.8

5.0

1.08

56

.283

-.172

  

1

8.7

8.8

.82

87

.415

-.090

  

12

1.5

1.1

2.05

339

.041

.126