Variation of patient turnover on a 30-minutes basis for 3 ... · Variation of patient turnover on a...
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Variation of patient turnover on a30-minutes basis for 3 years: analysis of
routine data of a Swiss University Hospital
Sarah N. Musy, Christos T. Nakas, and Michael Simon
UseR! Toulouse, 10.07.2019
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Background
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Nurses
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Nurses staffing and patients
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Nurses staffing and patients
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Data, Methods & Results
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Overview
Part of a detailed descriptive analysis of University Hospital inSwitzerland
30-minutes interval → 52 millions observationsTwo data merged70 units from 10 departments4,633 nurses & 128,484 patients
Number of nurses and patients
Number of patient turnoverIncrease workload
Administrative tasksPatient care needsAdditional patients
Patient-to-nurse ratio constant → movement of patients canhappen
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Patient turnover
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Patient turnover
Date Time Department Unit
2015-06-26 19:15 Intensive care Intens 12015-06-26 22:00 Orthopaedics & Plastic Surgery Orthop 12015-06-30 19:30 Intensive care Intens 22015-07-01 19:05 Intensive care Intens 32015-07-03 13:25 Intensive care Intens 2
2015-07-04 20:00 Orthopaedics & Plastic Surgery Orthop 12015-07-08 14:00 Internal Medicine Intern 12015-07-08 14:12 Internal Medicine Intern 12015-07-09 13:10 Internal Medicine Intern 12015-07-10 14:38 Internal Medicine Intern 1
2015-07-17 16:41 Internal Medicine Intern 12015-07-18 17:25 Intensive care Intens 22015-07-20 03:40 Intensive care Intens 42015-07-21 13:50 Intensive care Intens 22015-07-23 15:20 Intensive care Intens 2
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Patient turnover
Date Time Department Unit
2015-06-26 19:15 Intensive care Intens 12015-06-26 22:00 Orthopaedics & Plastic Surgery Orthop 12015-06-30 19:30 Intensive care Intens 22015-07-01 19:05 Intensive care Intens 32015-07-03 13:25 Intensive care Intens 2
2015-07-04 20:00 Orthopaedics & Plastic Surgery Orthop 12015-07-08 14:00 Internal Medicine Intern 12015-07-08 14:12 Internal Medicine Intern 12015-07-09 13:10 Internal Medicine Intern 12015-07-10 14:38 Internal Medicine Intern 1
2015-07-17 16:41 Internal Medicine Intern 12015-07-18 17:25 Intensive care Intens 22015-07-20 03:40 Intensive care Intens 42015-07-21 13:50 Intensive care Intens 22015-07-23 15:20 Intensive care Intens 2
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Patient turnover
Date Time Department Unit
2015-06-26 19:15 Intensive care Intens 12015-06-26 22:00 Orthopaedics and Plastic Surgery Orthop 12015-06-30 19:30 Intensive care Intens 22015-07-01 19:05 Intensive care Intens 32015-07-03 13:25 Intensive care Intens 2
2015-07-04 20:00 Orthopaedics and Plastic Surgery Orthop 12015-07-08 14:00 Internal Medicine Intern 12015-07-08 14:12 Internal Medicine Intern 12015-07-09 13:10 Internal Medicine Intern 12015-07-10 14:38 Internal Medicine Intern 1
2015-07-17 16:41 Internal Medicine Intern 12015-07-18 17:25 Intensive care Intens 22015-07-20 03:40 Intensive care Intens 42015-07-21 13:50 Intensive care Intens 22015-07-23 15:20 Intensive care Intens 2
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Transfers for Intern 1
Date Time Department Unit Move
2015-06-26 19:15 Intensive care Intens 1 NotAdmission2015-06-26 22:00 Orthopaedics and Plastic Surgery Orthop 1 TransferOut2015-06-30 19:30 Intensive care Intens 2 TransferOut2015-07-01 19:05 Intensive care Intens 3 TransferOut2015-07-03 13:25 Intensive care Intens 2 TransferOut
2015-07-04 20:00 Orthopaedics and Plastic Surgery Orthop 1 TransferOut2015-07-08 14:00 Internal Medicine Intern 1 TransferIn2015-07-08 14:12 Internal Medicine Intern 1 TransferIn2015-07-09 13:10 Internal Medicine Intern 1 TransferIn2015-07-10 14:38 Internal Medicine Intern 1 TransferIn
2015-07-17 16:41 Internal Medicine Intern 1 TransferIn2015-07-18 17:25 Intensive care Intens 2 TransferOut2015-07-20 03:40 Intensive care Intens 4 TransferOut2015-07-21 13:50 Intensive care Intens 2 TransferOut2015-07-23 15:20 Intensive care Intens 2 NotDischarge
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Add two variables
# Package
library(dplyr)
# Look at before/after each transfer
patient01 <- patient01 %>%
mutate(next.Tr = lead(Move),
before.Tr = lag(Move))
Date Time Unit Move next.Tr before.Tr
2015-06-26 19:15 Intens 1 NotAdmission TransferOut NA2015-06-26 22:00 Orthop 1 TransferOut TransferOut NotAdmission2015-06-30 19:30 Intens 2 TransferOut TransferOut TransferOut2015-07-01 19:05 Intens 3 TransferOut TransferOut TransferOut2015-07-03 13:25 Intens 2 TransferOut TransferOut TransferOut
2015-07-04 20:00 Orthop 1 TransferOut TransferIn TransferOut2015-07-08 14:00 Intern 1 TransferIn TransferIn TransferOut2015-07-08 14:12 Intern 1 TransferIn TransferIn TransferIn
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Select transfers for Intern 1
# Package
library(dplyr)
# Transfer in
patient01 <- patient01 %>%
mutate(
TransferIn = case_when(
Move %in% "TransferIn" &
before.Tr %ni% c("TransferIn", "Admission") ~ 1,
TRUE ~ 0),
TransferOut = case_when(
Move %in% "TransferOut" &
before.Tr %in% c("TransferIn", "Admission") ~ 1,
TRUE ~ 0)
)
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Select transfers for Intern 1
Date Time Unit TransferIn TransferOut
2015-06-26 19:15 Intens 1 0 02015-06-26 22:00 Orthop 1 0 02015-06-30 19:30 Intens 2 0 02015-07-01 19:05 Intens 3 0 02015-07-03 13:25 Intens 2 0 0
2015-07-04 20:00 Orthop 1 0 02015-07-08 14:00 Intern 1 1 02015-07-08 14:12 Intern 1 0 02015-07-09 13:10 Intern 1 0 02015-07-10 14:38 Intern 1 0 0
2015-07-17 16:41 Intern 1 0 02015-07-18 17:25 Intens 2 0 12015-07-20 03:40 Intens 4 0 02015-07-21 13:50 Intens 2 0 02015-07-23 15:20 Intens 2 0 0
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Select transfers for Intern 1
Unit Date Time N Patient Days N Admission N Discharge N Tranfer In N Transfer Out
Intern 1 2015-03-11 07:30 10 Wednesday 0 0 0 0Intern 1 2015-03-11 08:00 10 Wednesday 0 0 0 0Intern 1 2015-03-11 08:30 10 Wednesday 0 0 0 0Intern 1 2015-03-11 09:00 10 Wednesday 0 0 0 0Intern 1 2015-03-11 09:30 11 Wednesday 1 0 0 0
Intern 1 2015-03-11 10:00 11 Wednesday 0 2 0 0Intern 1 2015-03-11 10:30 9 Wednesday 0 1 0 0Intern 1 2015-03-11 11:00 8 Wednesday 0 0 0 0Intern 1 2015-03-11 11:30 8 Wednesday 0 0 0 0Intern 1 2015-03-11 12:00 8 Wednesday 0 0 0 0
Intern 1 2015-03-11 12:30 8 Wednesday 0 0 0 0Intern 1 2015-03-11 13:00 8 Wednesday 0 0 0 0Intern 1 2015-03-11 13:30 8 Wednesday 0 0 0 0
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Plot Intern 1
Weekdays Weekends
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Hou
rs
Group Admissions Discharges Transfers in Transfers out
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Plot Intens 1
Weekdays Weekends
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Group Admissions Discharges Transfers in Transfers out
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Conclusion
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Conclusion
Detailed data on unit and daily levels
Combination of R functions
Modelling nurse staffing
Modelling mortality