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. Author manuscript; available in PMC: 2011 Feb 23.
Published in final edited form as: Health Serv Res. 2009 Oct 29;45(1):79–97. doi: 10.1111/j.1475-6773.2009.01061.x

Table 4.

Stability of the nursing home incontinence quality measure (QM) between the 1st quarter (Q1) and 3rd quarter (Q3) of 2005 and the impact of case mix

CMS QM
 Risk-Adjusted QM
Stability* Adjusted R2** Stability* Adjusted R2**
All nursing homes (n=9799) r=0.87 0.26 r=0.78 0.01
Top 25% and bottom 25% nursing homes (n=4900) r=0.72 0.38 r=0.60 0.01
Top 10% and bottom 10% nursing homes (n=1960) r=0.49 0.48 r=0.36 0.03
*

Pearson correlation of the QM between Q1 and Q3 of 2005.

**

Derived from the multivariate ordinary least squares model of short-term change of the QM as a function of short-term change of case mix. See Table 2 for definitions of case mix variables. Short-term change of QM (or case mix) is defined as the QM (or case mix) in Q3 minus the QM (or case mix) in Q1 of 2005.

Note: Top and bottom nursing homes are defined based on rankings of the short-term change of the QM (CMS or risk-adjusted QM) between Q1 and Q3 of 2005. The stabilities for all nursing homes in the CMS QM (r=0.87) and the risk-adjusted QM (r=0.78) were identical to the ones shown in Table 2.