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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: Circ Heart Fail. 2014 Mar 14;7(3):427–433. doi: 10.1161/CIRCHEARTFAILURE.113.000698

Table 4.

Adjusted P-Values* for Pairwise Comparisons of RSMRs and RSIRs between Quartiles of RS-NIPPV

Quartile 1
and
Quartile 2		 Quartile 1
and
Quartile 3		 Quartile 1
and
Quartile 4		 Quartile 2
and
Quartile 3		 Quartile 2
and
Quartile 4		 Quartile 3
and
Quartile 4
RSMR 1 1 0.939 1 0.1122 0.0438
RSIR 0.0012 0.0198 0.0006 1 1 1
Median LOS 1 1 0.7938 1 0.249 0.1932

RS-NIPPV denotes risk-standardized non-invasive positive pressure ventilation rate; RSMR, risk-standardized mortality rate; RSIR, risk-standardized intubation rate; LOS, length of stay.

*

P values for all comparisons were calculated using Kruskal-Wallis tests and adjusted using the Bonferroni correction.