Table 7.

Comparison of total count of nursing home residence months(n = 150, Weighted n = 520,260)

	Weighted mean difference in total number of nursing home residence months (95% CI)	p-value	Weighted Pearson correlation coefficient	p-value
Algorithm 1*vs. Expert Review	-0.13 (-0.36, 0.11)	0.30	0.83	<0.0001
Algorithm 2†vs. Expert Review	-0.01 (-0.11, 0.10)	0.93	0.97	<0.0001

CI = confidence interval

*Algorithm 1 defined a person-month as a nursing home stay if there was at least one day in the month where the nursing home RULE = "PROBABLE"; otherwise the person-month was considered not to be a nursing home stay.

^†Algorithm 2 defined a person-month as a nursing home stay if there was at least one day in the month where the nursing home RULE = "PROBABLE" or RULE = "POSSIBLE"; otherwise the person-month was considered not to be a nursing home stay.