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Introduction to StatTools Navigating the Site
Statistics Toolkit (STATTOOLS) is a web based resource of the Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, and it provides access to statistical tests and functions that are commonly used by clinicians preparing clinical studies or analysing data. The site was first established in mid-1990s as a resource for departmental staff.

The content provided on StatTools is produced and maintained by Professors Allan Chang and Daljit Sahota. Prof Chang is Professor Emeritus of the Department of Obstetrics and Gynaecology whilst Prof Sahota is a Professor in the same Department. Whilst both Profs Chang and Sahota are experienced researchers with many peer-reviewed scientific papers in leading journals, neither is a formally trained Statistician. The material provided in STATTOOLS is therefore intended as a supplement and not a replacement for formal lectures on statistical theory and data analysis which would be provided by a formal Statistician. The content and functions provided on STATTOOLS is based on past requests received by either Profs Chang or Sahota for assistance.

Every effort has been made to compare reported results with those reported by standard statistical software such as SPSS, MEDCalc and STATA to ensure that they are accurate and reliable. However, errors and omissions may still exist, and users should assure themselves that the contents and advise provided are correct before accepting them.


The Department of Obstetrics and Gynaecology of The Chinese University of Hong Kong reserves the right to amend, update and delete any information of the website without prior notice. The Department accepts no liability for any loss, change or damage howsoever arising from any use or misuse of or reliance on any information in this website.