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Table 3 Result of linear regression analysis for the number of nursing staff per 100,000 population

From: The association between higher nurse staffing standards in the fee schedules and the geographic distribution of hospital nurses: A cross-sectional study using nationwide administrative data

 

Nurse density

Associate nurse density

Nursing aid density

Non-standardizedd

Standardized

Non-standardizedd

Standardized

Non-standardizedd

Standardized

β

95% CI

β

95% CI

β

95% CI

β

95% CI

β

95% CI

β

95% CI

Hospital bed densities per 100,000 population

 Beds with a 7:1 patient-to-nurse ratio

0.49

0.41

0.57***

0.62

0.56

0.68***

0.05

0.01

0.10*

0.16

0.09

0.23***

0.09

0.05

0.13***

0.24

0.17

0.30***

 Beds with a 10:1 patient-to-nurse ratio

0.36

0.29

0.43***

0.46

0.39

0.53***

0.05

0.03

0.08***

0.15

0.09

0.22***

0.10

0.06

0.13***

0.25

0.19

0.31***

 Beds with a 13:1 patient-to-nurse ratio

0.24

0.05

0.44*

0.07

0.02

0.12*

0.02

−0.05

0.09

0.01

−0.04

0.06

0.06

−0.03

0.14

0.03

−0.01

0.08

 Beds with a 15:1 patient-to-nurse ratio

0.33

0.19

0.47***

0.12

0.07

0.18***

0.22

0.15

0.28***

0.20

0.14

0.25***

0.12

0.03

0.21*

0.09

0.04

0.14***

 Intensive care unit bedsa

3.27

2.34

4.21***

0.30

0.24

0.36***

−0.06

−0.42

0.30

−0.01

−0.07

0.05

0.29

0.03

0.55*

0.05

0.00

0.11

 Long-term care ward beds

0.18

0.09

0.27***

0.17

0.11

0.24***

0.18

0.13

0.23***

0.42

0.36

0.47***

0.29

0.25

0.32***

0.56

0.51

0.61***

 Psychiatric ward beds

0.17

0.11

0.22***

0.19

0.13

0.25***

0.11

0.08

0.14***

0.30

0.24

0.36***

0.15

0.13

0.17***

0.34

0.29

0.40***

Socioecomic variables

 Population density (refefence: 1st quartile)

  2nd quartile

31.78

1.35

62.21*

0.09

0.03

0.16*

−18.78

−32.79

−4.77*

−0.13

−0.19

−0.07***

−3.95

−19.03

11.13

−0.02

−0.08

0.03

  3rd quartile

10.12

−18.94

39.18

0.03

−0.05

0.10

−14.01

−27.69

−0.32*

−0.10

−0.17

−0.03**

−9.83

−27.30

7.63

−0.06

−0.13

0.01

  4th quartile

24.32

−12.67

61.32

0.07

−0.04

0.18

−17.39

−32.75

−2.04*

−0.12

−0.23

−0.02*

−6.79

−31.05

17.48

−0.04

−0.14

0.06

 Unemployment rate (%)

−2.12

−8.29

4.04

−0.02

−0.08

0.04

2.71

−0.78

6.20

0.06

0.01

0.12*

2.74

−0.43

5.90

0.05

0.00

0.11*

 Per capita income (100,000 yen/person)

3.08

−0.08

6.24

0.09

0.00

0.19

−1.76

−2.72

−0.80**

−0.13

−0.22

−0.04**

−1.56

−2.72

−0.41**

−0.10

−0.18

−0.01*

 Standard number of beds in Prefectural Medical Care Plans (1,000 beds)

4.16

0.86

7.46*

0.09

0.02

0.17*

−1.23

−2.12

−0.33**

−0.07

−0.13

0.00

0.17

−0.99

1.33

0.01

−0.06

0.07

Nurse workforce related variables

 Average annual wage of nurses (100,000 yen)b,c

−8.53

−12.66

−4.41***

−0.18

−0.26

−0.11***

−1.18

−2.99

0.62

−0.06

−0.13

0.01

−1.22

−3.16

0.71

−0.05

−0.12

0.02

 The number of graduates from nursing schools per 100,000 populationc

−2.10

−16.33

12.12

−0.01

−0.07

0.05

      

0.00

−0.34

0.34

0.00

−0.06

0.06

 The number of graduates from associate nursing schools per 100,000 populationc

      

1.32

0.59

2.04**

0.16

0.10

0.22***

      

 Turnover ratec

−7.82

−13.25

−2.40**

−0.12

−0.19

−0.05**

5.26

2.59

7.94***

0.19

0.12

0.25***

5.78

2.86

8.69***

0.176

0.11

0.24***

  Adj R-squared

0.76

     

0.79

     

0.82

     
  1. * p < 0.05, ** p < 0.01, *** p < 0.001
  2. aIntensive care units include emergency departments, high dependency units, stroke care units, neonatal and pediatric intensive care units, and maternal-fetal intensive care units
  3. b1 US$ = 109 yen as of June 3, 2016
  4. cThe data at prefecture level were substituted
  5. dWith clusters robust standard errors at the prefecture level