Table 3. Use of Estimated Propensity Score (PS) in Analyses for Outcomes of Interest.

Study	Sample	Estimation of Treatment Effects	Congruent to Design
Petersen et al. (2000), Ayanian et al. (2002), Lindenauer et al. (2005), Bhatt et al. (2004), Ferguson et al. (2002), Orosz et al. (2004), Polanczyk et al. (2001), Vincent et al. (2002)	Matched	Weighted average of paired differences, McNemar test, conditional logistic regression	Yes
Ayanian et al. (2002), Frolkis et al. (2003), Abidov et al. (2005), Grzybowski et al. (2003), Gum et al. (2001), Vikram et al. (2003), Orosz et al. (2004), Vincent et al. (2002)	Matched	Log-rank test of Kaplan–Meier curves, logistic or Cox regressions	No
Schneeweiss et al. (2002), Aronow et al. (2001), Bahaev et al. (2005), Girou et al. (2003), Mehta et al. (2002), Mukamal et al. (2001), Newby et al. (2002), Rao et al.(2004), Wassertheil-Smoller et al. (2004), Hsueh et al. (2004)	Unmatched	Log-linear, logistic, or Cox regressions	Yes
Hannan et al. (2005), Wang et al. (2005), Stenestrand and Wallentin (2002), Mitra et al. (2001)	Stratified	Estimates within strata	Yes