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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