Letters

Potential biases were not taken into account in study of waiting times

BMJ 1998; 316 doi: http://dx.doi.org/10.1136/bmj.316.7125.150 (Published 10 January 1998) Cite this as: BMJ 1998;316:150
  1. Nick Black, Professor of health services researcha
  1. a Department of Public Health and Policy, London School of Hygiene and Tropical Medicine, London WC1E 7HT

    Editor—Before Dowling's conclusion—that fundholding shortens waiting times—is accepted, four potential biases need to be considered.1

    Firstly, more information is required about the completeness and accuracy of the data that he analysed: only a small sample of patients' records in a single, …

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