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Table 4 Counts and incidence rate ratios (IRRs) for specific variables presented with 95% confidence intervals

From: The effect of an active implementation of a disease management programme for chronic obstructive pulmonary disease on healthcare utilization - a cluster-randomised controlled trial

N= 1372

 

Intervention (N=458)

Control (N=376)

Ext. control (N=538)

Intervention vs. Control IRR

Intervention vs. Ext control IRR

Control vs. Ext control IRR

Consultations with GP (daytime)

2008-09

7.75 6.76-8.87

7.57 6.43-8.92

6.75 6.24-7.29

1.02 0.83-1.26

1.15 0.98-1.34

1.12 0.94-1.34

 

2009-10

7.34 6.60-8.17

8.50 7.12-10.14

7.28 6.73-7.88

0.86 0.71-1.06

1.01 0.88-1.15

1.17 0.96-1.41

 

IRR

0.95 0.88-1.02

1.12 2 1.08-1.17

1.08 2 1.02-1.44

0.85 2 0.78-0.92

0.88 1 0.80-0.96

1.04 0.97-1.12

Contacts to out-of-hours services

2008-09

0.68 0.47-0.98

0.60 0.42-0.86

0.61 0.51-0.74

1.12 0.66-1.90

1.10 0.73-1.66

0.99 0.66-1.47

 

2009-10

0.69 0.47-1.01

0.74 0.56-0.98

0.56 0.46-0.68

0.93 0.60-1.45

1.23 0.83-1.83

1.32 0.94-1.85

 

IRR

1.02 0.85-1.22

1.22 1 1.02-1.48

0.92 0.78-1.08

0.83 0.64-1.08

1.12 0.88-1.42

1.34 1 1.05-1.71

Admissions with another diagnosis

2008-09

0.35 0.27-0.45

0.36 0.28-0.46

0.33 0.28-0.38

0.97 0.68-1.38

1.06 0.79-1.43

1.10 0.82-1.46

 

2009-10

0.33 0.27-0.41

0.47 0.38-0.58

0.45 0.36-0.56

0.70 1 0.52-0.94

0.74 0.55-1.01

1.06 0.78-1.43

 

IRR

0.95 0.69-1.32

1.31 0.91-1.88

1.36 1 1.06-1.74

0.73 0.44-1.18

0.70 0.47-1.05

0.96 0.62-1.49

Bed days

2008-09

1.56 1.09-2.22

2.07 1.55-2.63

1.48 1.11-1.98

0.77 0.49-1.21

1.05 0.67-1.63

1.36 0.90-2.06

 

2009-10

1.61 1.33-1.96

1.70 1.26-2.29

2.01 1.59-2.56

0.95 0.66-1.36

0.80 0.60-1.07

0.84 0.58-1.23

 

IRR

1.04 0.69-1.56

0.84 0.64-1.11

1.36 1 1.09-1.70

1.23 0.75-2.02

0.76 0.48-1.21

0.62 1 0.43-0.89

Readmissions^

2008-09

0.07 0.05-0.12

0.13 0.10-0.17

0.05 0.04-0.08

0.56 1 0.33-0.97

1.38 0.78-2.47

2.45 2 1.53-3.94

 

2009-10

0.07 0.05-0.09

0.12 0.06-0.21

0.14 0.11-0.19

0.59 0.30-1.15

0.48 1 0.32-0.72

0.82 0.42-1.60

 

IRR

0.95 0.55-1.63

0.90 0.50-1.64

2.71 2 1.90-3.86

1.05 0.46-2.38

0.35 2 0.18-0.66

0.33 2 0.16-0.68

Contacts to outpatient services with any

2008-09

3.07 2.70-3.48

3.38 2.83-4.03

3.03 2.59-3.54

0.91 0.73-1.32

1.01 0.84-1.22

1.12 0.88-1.42

diagnosis

2009-10

2.91 2.55-3.34

3.68 3.30-4.11

3.65 2.96-4.49

0.79 2 0.67-0.94

0.80 0.63-1.01

1.01 0.80-1.27

 

IRR

0.95 0.81-1.11

1.09 0.95-1.25

1.20 2 1.22-1.29

0.87 0.71-1.07

0.78 1 0.66-0.94

0.90 0.78-1.04

Contacts to outpatient services with

2008-09

0.16 0.11-0.24

0.28 0.19-0.40

0.19 0.12:0.30

0.59 1 0.35-0.99

0.86 0.48-1.57

1.47 0.83-2.62

a lung-related diagnosis

2009-10

0.22 0.13:0.36

0.28 0.17-0.46

0.26 0.19-0.38

0.78 0.67-0.94

0.83 0.45-1.54

1.07 0.59-1.92

 

IRR

1.35 0.76-2.40

1.02 0.67-1.54

1.41 2 1.13-1.74

1.33 0.65-2.70

0.95 0.51-1.81

0.72 0.46-1.15

  1. ^A readmission was defined as an acute admission within 30 days of the last admission.
  2. 1Statistical significance p < 0.05.
  3. 2Statistical significance p < 0.005.
  4. No noteworthy difference was found for the admissions with a lung-related diagnosis. Data not shown.
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BMC Health Services Research

ISSN: 1472-6963

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