TY  - JOUR
T1  - Is After-Hours Orthopaedic Surgery Associated with Adverse Outcomes?
AU  - Bernstein, Joseph
AU  - Ahn, Jaimo
Y1  - 2010/02/01
N1  - 
JO  - The Journal of Bone & Joint Surgery
SP  - 524
EP  - 524
VL  - 92
IS  - 2
N2  - 
The study perhaps could be considered to be under the category "prognostic studies—investigating the effect of a patient characteristic on the outcome of disease." (In this case, the "patient characteristic" is the time of the operation.) In the JBJS guidelines, a prognostic study can be considered Level I if it was "high-quality." Of course, the height of quality is a subjective judgment, but we question whether this study is of sufficiently high quality to be deemed Level I. For one thing, the two groups were patently dissimilar beyond the variable in question; in addition, the sample size was inadequately powered.

SN  - 0021-9355
M3  - doi: 
UR  - http://dx.doi.org/
ER  -