PEDIATRICS Vol. 66 No. 6 December 1980, pp. 1033-1034
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Letters to the Editor

M. De Swiet MD, MRCP1, E. A. Shinebourne MD, FRCP1, and P. M. Fayers BSc1

1 Cardiothoracic Institute, Brompton Hospital, Fulham Road, London, England SW3 6HP

We agree with Dr Gillum that omission of some of the readings made at ages 6 months and 1 year could have produced bias in the results that we have quoted for blood pressure at these ages. However, the 5-cm cuff whose results were omitted was one of the middle sized cuffs and therefore the weights of the infants whose blood pressures were omitted were in the middle of the distribution at each age. As the Table shows, their blood pressures when measured on other occasions were also not significantly different from the blood pressures of the entire study group.