Bernstein, S.L, Rennie W.P., and Alagappan K.
"Impact of Yankee Stadium Bat Day on blunt trauma in northern New York
Annals of Emergency Medicine
23 no.3 (1994): 555-559.
- Study objective:
- To determine the incidence of blunt trauma in northern New York City
before and after the distribution of 25,000 baseball bats at Yankee
- Prospective multicenter study, including ten days before and ten days
after Bat Day (June 3, 1990).
- Ten emergency departments in the Bronx and northern Manhattan.
- Type of participant:
- All patients presenting to the ED with baseball bat injuries.
- Each hospital collected the following data for each subject:
consciousness, results of computed tomography scan of the brain (if
performed), history source, and disposition of the patient. Average
daily atmospheric temperature was recorded for each day of the study.
- Measurements and main results:
- Seventy-seven patients sustained bat injuries, 38 (49%) before and
36 (47%) after Bat Day. There were no significant differences between
the two groups with respect to age, sex, time of injury, number and
distribution of fractures and lacerations, incidence of loss of
consciousness, source of history, or disposition. There was a positive
association between the number of cases on a given day and the average
temperature that day (r = .5; P lt .01).
- The distribution of 25,000 wooden baseball bats to attendees at
Yankee Stadium did not increase the incidence of bat-related trauma in
the Bronx and northern Manhattan. There was a positive correlation
between daily temperature and the incidence of bat injury. The informal
but common impressions of emergency clinicians about the
cause-and-effect relationship between Bat Day and bat trauma were