TY  - JOUR
T1  - LImitations of administrative databases
AU  - Haut ER, Pronovost PJ, Schneider EB
Y1  - 2012/06/27
N1  - 10.1001/jama.2012.6626
JO  - JAMA
SP  - 2589
EP  - 2590
VL  - 307
IS  - 24
N2  - 
To the Editor: Clinical research relying on readily available, inexpensive data originally collected for administrative or billing purposes or both has increased exponentially. Yet the inherent limitations of these administrative databases are frequently ignored. Drs Vaughan Sarrazin and Rosenthal1 provided a summary of these important limitations, including some potential pitfalls in examining diagnostic procedures. A major and often overlooked pitfall is surveillance bias—the phenomenon of “the more you look, the more you find.”2

SN  - 0098-7484
M3  - doi: 10.1001/jama.2012.6626
UR  - http://dx.doi.org/10.1001/jama.2012.6626
ER  -