RESEARCH

A prospective study of concussions among National Hockey League players during regular season games: the NHL-NHLPA Concussion Program
Brian W. Benson MD PhD, Willem H. Meeuwisse MD PhD, John Rizos MD, and colleagues
April 18, 2011

A prospective study of concussions among National Hockey League players during regular season games: the NHL-NHLPA Concussion Program

Players who experienced a concussion playing hockey took more days to return to play if they had headache, low energy, amnesia or abnormalities on physical examination. Benson and colleagues found this by collecting information about 559 concussions in hockey players and following their recovery over time. The authors suggest a more precautionary approach to allowing players with these symptoms to return to play. Full article

COMMENTARY: “Sport” and “non-sport” concussions
ANALYSIS: Concussion in youth ice hockey: It’s time to break the cycle


Oral contraceptives and the risk of gallbladder disease: a comparative safety study
Mahyar Etminan PharmD MSc, Joseph A.C. Delaney PhD, Brian Bressler MD MSc, James M. Brophy MD PhD
April 18, 2011

Oral contraceptives and the risk of gallbladder disease: a comparative safety study Newer formulations of oral contraceptive pills carry similar risks of gallbladder disease to older formulations. This finding is from an analysis of health data on more than 2.7 million women in the United States who were using various forms of combined oral contraceptive pill between 1997 and 2009. Although some statistically significant differences in the risk of gallbladder disease were found between formulations, these differences were small and unlikely to be of clinical significance, say the authors. Full article


Corticosteroid use during pregnancy and risk of orofacial clefts
Anders Hviid MSc DMSc, Ditte Mřlgaard-Nielsen MSc
April 11, 2011

Corticosteroid use during pregnancy and risk of orofacial clefts Corticosteroid use in general was not associated with an increased risk of orofacial clefts. This is the conclusion of a cohort study of all live births in Denmark over a 12-year period. Although a weak association with use of dermatologic corticosteroids and increased risk of cleft lip with or without cleft palate was observed, Hviid and Molgaard-Nielsen caution that this finding does not signify a causal connection. Reasons for this observed association remain unclear. Full article

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CMAJ in the News

"Starve a fever, feed a concussion: Speedy feeding offers hope of better healing" (The Globe and Mail), April 21, 2011

"Newer Versions of the Pill Pose No Added Risk to Gallbladder" (U.S. News & World Report), April 20, 2011

"Counterpoint: Drug addicts can’t recover if they’re already dead" (National Post), April 20, 2011

"Food safety: the forgotten issue?" (CBC), April 20, 2011

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