# The Surgical Outcome Risk Tool (SORT) – a preoperative risk prediction tool

> Preoperative risk prediction tool for 30-day surgical mortality. (iPhone/iPad app by Cranworth Medical Ltd.)

- Source: https://appshunter.io/ios/app/the-surgical-outcome-risk-tool-sort-a-preoperative-risk-prediction-tool/id1078747046 (this page in markdown: same URL + `.md`)
- Developer: [Cranworth Medical Ltd](https://appshunter.io/developer/404679081)
- Category: Medical, Reference
- Price: Free
- Age rating: 17+
- Requires: iOS 9.0 · 16 MB
- Languages: American English
- Released: 2016-04-18
- Data updated: 2026-08-08
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/the-surgical-outcome-risk-tool-sort-a-preoperative-risk-prediction-tool/id1078747046/reviews.md

## What is The Surgical Outcome Risk Tool (SORT)?

The SORT is a FREE preoperative risk prediction tool that provides a percentage risk for mortality within 30 days of surgery.  Developed and validated on a UK adult patient population (aged 16 or over) who had surgery as part of an inpatient stay.  Exclusions: obstetrics, neurosurgery, cardiac, and transplant surgery.

FEATURES:
* Offline capability - this means the calculator works even where there is no mobile/wireless reception, for example in all clinical settings and even in reception black spots.
* Includes a DYNAMIC search button for a free text search of surgical procedures;
* All variables are quick and easy to obtain before surgery, giving the SORT an advantage over some other widely-available risk assessment tools;
* Can be used for all surgical severity from minor-complex categories of surgery;
* For all surgical urgency from elective to immediate/emergency surgery;

POTENTIAL AREAS OF USE:
* There is an increased focus on peri-operative medicine including risk assessments of patients and potential outcomes following surgery.
* The SORT provides a mortality estimate that can help set the scene to identify high risk patients, who might benefit from interventions such as admission to critical care.  It could also contribute to preoperative assessments, the consent process and shared decision-making with patients and aid resource planning.
* A simple tool that could be used together with clinical judgement and as part of the overall surgical toolkit.
* From a survey we know that the SORT is starting to be used in pre-assessment clinics, high risk clinics, emergency departments, and surgery departments.

BACKGROUND:
* Developed by researchers from The National Confidential Enquiry into Patient Outcome and Death (NCEPOD) - and doctors from the UCL/UCLH Surgical Outcomes Research Centre (SOuRCe);
* A high ranking journal.  The work was published in the British Journal of Surgery in 2014;
* A large data set.  Following exclusions from 19,097 anonymised patient records from an NCEPOD study, from 326 NHS and independent sector hospitals in the UK, 16,788 records were used in the analyses;
* A large scale study.  At the time of publication, this work represented the largest analysis of risk prediction tools in a UK cohort of patients undergoing inpatient surgery in multiple surgical specialties.  

We hope this software tool proves to be a useful addition to your overall surgical toolkit.

## Key features

- 30-day mortality risk percentage
- Offline capability
- Dynamic surgical procedure search
- Quick and easy variable input
- Applicable to all surgical severities and urgencies
- Supports preoperative assessment and shared decision-making

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/the-surgical-outcome-risk-tool-sort-a-preoperative-risk-prediction-tool/id1078747046/reviews.md

### 5/5 — User

*2017-05-24, version 1.0.1*

Really easy to use. Relevant 
Practical bedside tool..

### 5/5 — Very useful surgical risk tool!

*2016-06-20, version 1.0*

NCEPOD have produced a useful mortality risk too to use every day in line with the NELA project amongst others. Surgical trainees need to have an appreciation of the surgical risk stratification and its use in modern management of acute surgery.

## Frequently asked questions about The Surgical Outcome Risk Tool (SORT)

### What is SORT used for?

SORT is a preoperative risk prediction tool that calculates the percentage risk of mortality within 30 days of surgery. It helps identify high-risk patients, aids in preoperative assessments, and supports shared decision-making with patients.

### Does SORT work offline?

Yes, SORT has offline capability, meaning the calculator works even without mobile or wireless reception. This is advantageous in various clinical settings.

### What types of surgery does SORT cover?

SORT can be used for all surgical severity from minor to complex categories and for all surgical urgency from elective to immediate/emergency surgery. Exclusions include obstetrics, neurosurgery, cardiac, and transplant surgery.

### What is the age range for SORT users?

SORT was developed and validated on a UK adult patient population aged 16 or over.

### How was SORT developed?

SORT was developed by researchers from The National Confidential Enquiry into Patient Outcome and Death (NCEPOD) and doctors from the UCL/UCLH Surgical Outcomes Research Centre (SOuRCe). The work was published in the British Journal of Surgery in 2014.

### What data was used to develop SORT?

The tool was developed using a large dataset of 16,788 anonymised patient records from a UK NCEPOD study, representing one of the largest analyses of risk prediction tools in a UK cohort at the time of publication.

### Is SORT available on Android devices?

Based on the provided data, SORT is supported on iPhone and iPod devices. Information regarding Android compatibility is not available.

### How often is SORT updated?

The latest version of SORT is 1.0.1, which was last updated on August 17, 2016. This indicates a less frequent update cycle.

## Version history (last 2 releases)

### 1.0.1 — 2016-08-17

This app has been updated by Apple to display the Apple Watch app icon.

Minor bug fixes.

### 1.0 — 2016-04-18

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-08.*