Required Statements
Disclosure of Interest:
The authors declare there are no conflicts of interest
Contribution of authors:
CRW conceived the idea, collated data and was the primary writer of the paper. L Rose coordinated data gathering, clinical practice and contributed to the paper writing. KMR coordinated the UK-WHO data analysis and contributed to the paper writing. JH performed all statistical analysis and contributed to the paper writing.
Details of Ethics approval:
As this study is a secondary use of anonymised data (see line 84) collected by staff within a care team in the course of care for their own patients or clients (without an intention to use it for research at the time of collection) ethics committee approval was not required.
Funding: The statistician’s funding was obtained from UHPT Research and Development generic funding. No other funding was required.
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