Table 2.

Effect of breathing rate measured at 28, 42 and 56 days (four, six and eight weeks) on residual survival based on Cox regression stratified by treatment group

Time (days)	Hazard ratio (HR)	95% Confidence interval (CI)	P value
28	1.002	0.977–1.027	0.883
42	1.008	1.001–1.015	0.020
56	1.019	1.006–1.032	0.005