Tractenberg, R. E., Jin, S., Patterson, M., Schneider, L. S., Gamst, A., Thomas, R. G., & Thal, L. J. (2000). Qualifying Change: A Method for Defining Clinically Meaningful Outcomes of Change Score Computation. J Am Geriatr Soc.

Tractenberg, Rochelle E., Shelia Jin, Marian Patterson, Lon S. Schneider, Anthony Gamst, Ronald G. Thomas, ja Leon J. Thal. "Qualifying Change: A Method for Defining Clinically Meaningful Outcomes of Change Score Computation." J Am Geriatr Soc 2000.

Tractenberg, Rochelle E., et al. "Qualifying Change: A Method for Defining Clinically Meaningful Outcomes of Change Score Computation." J Am Geriatr Soc 2000.