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Table 1 LoS analysis significant factor results

From: Predicting length of stay from an electronic patient record system: a primary total knee replacement example

Group

N

Proportion

Median

Mean

Median average deviation

Proportion %

Median deviation range

<2011

1748

82.1%

5

6.6

1.48

82.1

3.5–6.5

2011

382

17.9%

4

5.7

1.48

17.9

2.5–5.5

Monday

449

21.1%

5

6.0

1.5

21.1

3.5–6.5

Tuesday

186

8.7%

6

7.4

3.0

8.7

3–9

Wednesday

356

16.7%

6

6.7

3.0

16.7

3–9

Thursday

394

18.5%

5.5

6.7

2.2

18.5

3.3–7.7

Friday

359

16.9%

5

6.2

1.5

16.9

3.5–6.5

Saturday

322

15.1%

4

5.2

1.5

15.1

2.5–5.5

Sunday

64

3.0%

9

10.7

4.4

3.0

4.6–13.4

Female

1274

59.8%

6

6.8

2.97

59.8

3–9

Male

856

40.2%

5

5.9

2.97

40.2

2 - 8

C58

274

12.9%

5

6.3

1.5

12.9

3.5–6.5

C38

256

12.0%

5

6.2

1.5

12.0

3.5–6.5

C49

246

11.5%

5

6.3

3.0

11.5

2–8

C46

211

9.9%

5

6.6

3.0

9.9

2–8

C42

200

9.4%

6

7.0

3.0

9.4

3–9

C59

179

8.4%

4

5.1

1.5

8.4

2.5–5.5

C26

171

8.0%

5

5.9

1.5

8.0

3.5–6.5

C62

156

7.3%

6

7.7

3.0

7.3

3–9

C64

148

6.9%

6

6.3

3.0

6.9

3–9

Other consultant

289

13.6%

5

6.9

2.97

13.6

2–8

NHS hospital provider

88

4.1%

8

9.8

7.4

4.1

0.6- 15.4

Other discharge destination

26

1.2%

10

11.7

5.2

1.2

4.8–15.2

Usual place of residence

2016

94.6%

5

6.2

1.5

94.6

3.5–6.5

White, declined and unknown

2074

97.6%

5

6.4

1.5

97.6

3.5–6.5

Other ethnicity

50

2.4%

6.5

7.6

3.7

2.4

2.8–10.2

Factor

Mean

First Quartile

Median

Third Quartile

Median LoS at 40

Median LoS at 60

Median LoS at 80

Age

70

64

71

77

7.5

5

6

Factor

Mean

First Quartile

Median

Third Quartile

IMD at 3 Days LoS

IMD at 5 Days LoS

IMD at 7 Days LoS

Indicies of deprivation

14720

7526

15353

22400

24368

24189

24011