TY - JOUR
T1 - Bicycle Safety Helmets
AU - Weiss, Barry D.
AU - Capron, Alexander M.
AU - Widome, Mark D.
AU - Fetter, Victoria
AU - Dannenberg, Andrew L.
AU - Richter, Elihu D.
AU - Thompson, Robert S.
AU - Rivara, Frederick P.
AU - Thompson, Diane C.
PY - 1989/10/26
Y1 - 1989/10/26
N2 - To the Editor: Thompson and associates are to be commended for their carefully executed case–control study (May 25 issue),1 which attempts to establish the protective effect of bicycle safety helmets. Their study contains several sources of potential bias, however, that may limit the validity of the study results. Most important, 22.6 percent of Thompson's case patients (subjects with a head injury) had been involved in collisions with moving automobiles, as compared with only 12.5 and 3.9 percent in each of the two control groups. The subjects with a head injury were also less likely to have fallen onto soft surfaces….
AB - To the Editor: Thompson and associates are to be commended for their carefully executed case–control study (May 25 issue),1 which attempts to establish the protective effect of bicycle safety helmets. Their study contains several sources of potential bias, however, that may limit the validity of the study results. Most important, 22.6 percent of Thompson's case patients (subjects with a head injury) had been involved in collisions with moving automobiles, as compared with only 12.5 and 3.9 percent in each of the two control groups. The subjects with a head injury were also less likely to have fallen onto soft surfaces….
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U2 - 10.1056/NEJM198910263211713
DO - 10.1056/NEJM198910263211713
M3 - Letter
C2 - 2797082
AN - SCOPUS:0024342043
SN - 0028-4793
VL - 321
SP - 1194
EP - 1196
JO - New England Journal of Medicine
JF - New England Journal of Medicine
IS - 17
ER -