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Table 3 Full base modelsa of 36-month ASH rates for entire sample, complex and non-complex subgroups

From: GP- and practice-related variation in ambulatory sensitive hospitalisations of older primary care patients

Variables

Entire sample

Complex subgroup

Non-complex subgroup

(n = 3755)

(n = 1374)

(n = 2241)

IRR

95% CI

IRR

95% CI

IRR

95% CI

BRIGHT intervention group

1.07

0.88–1.30

1.04

0.82–1.32

1.18

0.92–1.51

ASHs 18 months prior to baseline

1.26

1.23–1.28

1.24

1.21–1.27

1.30

1.23–1.39

Age

1.06

1.05–1.06

1.04

1.03–1.05

1.06

1.05–1.08

Sex

 Male (reference)

      

 Femalea

      

Ethnicity

 NZ European (reference)

 NZ Maori

0.84

0.70–1.01

1.03

0.80–1.33

  

 Other b

0.76

0.68–0.84

0.65

0.55–0.75

  

Marital status

 Married (reference)

 Widow or widower

1.32

1.22–1.43

1.32

1.18–1.47

1.32

1.17–1.48

 Single or divorced

1.15

1.00–1.32

1.11

0.91–1.34

1.03

0.82–1.30

Living arrangement

 Alone (reference)

 With only spouse or partner

0.76

0.70–0.82

0.78

0.70–0.87

0.76

0.67–0.85

 Other

1.06

0.91–1.23

1.04

0.85–1.27

1.01

0.79–1.30

NZDep06 c of home address

1.04

1.03–1.06

1.03

1.01–1.06

1.05

1.02–1.07

Education

 Completed primary (reference)

 Completed secondary

0.82

0.74–0.91

0.86

0.74–0.99

0.82

0.70–0.96

 Completed tertiary

0.69

0.62–0.77

0.82

0.70–0.96

0.60

0.50–0.71

Number of health problems

1.27

1.24–1.30

1.16

1.12–1.20

1.34

1.28–1.41

Number of medication types

1.12

1.10–1.13

1.08

1.06–1.10

1.13

1.10–1.15

AMTS score d

0.91

0.88–0.95

  

0.88

0.83–0.93

GDS-15 score e

1.10

1.09–1.12

1.07

1.04–1.09

1.13

1.10–1.16

Social support score f

0.97

0.96–0.98

0.98

0.96–1.00

0.98

0.96–0.99

Adequate physical activity

0.68

0.63–0.73

0.69

0.61–0.77

0.75

0.66–0.84

Does not smoke

    

1.13

1.01–1.27

Does not drink

1.24

1.15–1.34

1.19

1.07–1.32

1.32

1.18–1.49

Frequency of alcohol intake

 Daily or almost daily (reference)

 Weekly

1.02

0.89–1.15

1.07

0.90–1.27

0.97

0.79–1.18

 Monthly

1.25

1.10–1.41

1.01

0.85–1.21

1.55

1.30–1.86

 Never

1.32

1.20–1.45

1.22

1.07–1.38

1.48

1.28–1.70

Nutritional risk score g

1.09

1.08–1.10

1.04

1.02–1.06

1.10

1.08–1.12

  1. a Candidate participant characteristics not included in fully adjusted analysis are represented as white space; b Includes European, Pacific, Asian, and African; c 2006 New Zealand Index of Deprivation [24]; d Abbreviated Mental Test Score [25]; e 15-item Geriatric Depression Scale [26]; f measured using the 11-item Duke Social Support Index [27]; g measured using the Australian Nutrition Screening Initiative [28]