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Standardised comparison of performance indicators in trauma - a new approach to case-mix variation.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Published

Standard

Standardised comparison of performance indicators in trauma - a new approach to case-mix variation. / Hollis, S.; Yates, D. W.; Woodford, M. et al.
In: Journal of Trauma, Vol. 38, No. 5, 05.1995, p. 763-766.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Hollis, S, Yates, DW, Woodford, M & Foster, P 1995, 'Standardised comparison of performance indicators in trauma - a new approach to case-mix variation.', Journal of Trauma, vol. 38, no. 5, pp. 763-766. <http://www.jtrauma.com/pt/re/jtrauma/abstract.00005373-199505000-00015.htm;jsessionid=JZPTXDmpnTHDJ1V1hWzjvbN43YT4y6CSNJYPZpnMwnvwpYQtfJfm!-1031399950!181195629!8091!-1>

APA

Hollis, S., Yates, D. W., Woodford, M., & Foster, P. (1995). Standardised comparison of performance indicators in trauma - a new approach to case-mix variation. Journal of Trauma, 38(5), 763-766. http://www.jtrauma.com/pt/re/jtrauma/abstract.00005373-199505000-00015.htm;jsessionid=JZPTXDmpnTHDJ1V1hWzjvbN43YT4y6CSNJYPZpnMwnvwpYQtfJfm!-1031399950!181195629!8091!-1

Vancouver

Hollis S, Yates DW, Woodford M, Foster P. Standardised comparison of performance indicators in trauma - a new approach to case-mix variation. Journal of Trauma. 1995 May;38(5):763-766.

Author

Hollis, S. ; Yates, D. W. ; Woodford, M. et al. / Standardised comparison of performance indicators in trauma - a new approach to case-mix variation. In: Journal of Trauma. 1995 ; Vol. 38, No. 5. pp. 763-766.

Bibtex

@article{7ba6ab48af634cb7aff4fdf5690c8a67,
title = "Standardised comparison of performance indicators in trauma - a new approach to case-mix variation.",
abstract = "An institution's trauma survival rate can be compared with that predicted by TRISS using definitive outcome-based evaluation. This examines W, the difference between actual and predicted survival rates; Z, the statistical significance of this difference; and M, a measure of the similarity of injury severity mix to the prediction data base. However, it is possible for two institutions with the same survival rate within each band of injury severity to have very different W and Z scores whilst retaining a similar M score. Clearly this is unsatisfactory. A new statistic, Wsub s , is therefore proposed, which is standardized with respect to injury severity mix, producing more accurate comparisons between different institutions. Confidence intervals are used to graphically illustrate the magnitude of Wsub s , its direction, accuracy, and statistical significance. Data from the U.K. Major Trauma Outcome Study are used to demonstrate the calculations and presentation of Wsub s and its advantages.",
author = "S. Hollis and Yates, {D. W.} and M. Woodford and P. Foster",
year = "1995",
month = may,
language = "English",
volume = "38",
pages = "763--766",
journal = "Journal of Trauma",
issn = "1529-8809",
publisher = "Lippincott Williams and Wilkins",
number = "5",

}

RIS

TY - JOUR

T1 - Standardised comparison of performance indicators in trauma - a new approach to case-mix variation.

AU - Hollis, S.

AU - Yates, D. W.

AU - Woodford, M.

AU - Foster, P.

PY - 1995/5

Y1 - 1995/5

N2 - An institution's trauma survival rate can be compared with that predicted by TRISS using definitive outcome-based evaluation. This examines W, the difference between actual and predicted survival rates; Z, the statistical significance of this difference; and M, a measure of the similarity of injury severity mix to the prediction data base. However, it is possible for two institutions with the same survival rate within each band of injury severity to have very different W and Z scores whilst retaining a similar M score. Clearly this is unsatisfactory. A new statistic, Wsub s , is therefore proposed, which is standardized with respect to injury severity mix, producing more accurate comparisons between different institutions. Confidence intervals are used to graphically illustrate the magnitude of Wsub s , its direction, accuracy, and statistical significance. Data from the U.K. Major Trauma Outcome Study are used to demonstrate the calculations and presentation of Wsub s and its advantages.

AB - An institution's trauma survival rate can be compared with that predicted by TRISS using definitive outcome-based evaluation. This examines W, the difference between actual and predicted survival rates; Z, the statistical significance of this difference; and M, a measure of the similarity of injury severity mix to the prediction data base. However, it is possible for two institutions with the same survival rate within each band of injury severity to have very different W and Z scores whilst retaining a similar M score. Clearly this is unsatisfactory. A new statistic, Wsub s , is therefore proposed, which is standardized with respect to injury severity mix, producing more accurate comparisons between different institutions. Confidence intervals are used to graphically illustrate the magnitude of Wsub s , its direction, accuracy, and statistical significance. Data from the U.K. Major Trauma Outcome Study are used to demonstrate the calculations and presentation of Wsub s and its advantages.

M3 - Journal article

VL - 38

SP - 763

EP - 766

JO - Journal of Trauma

JF - Journal of Trauma

SN - 1529-8809

IS - 5

ER -