Table 4.

Fisher’s exact test results of the correlation between the different PIRO variables and the outcome

	p-value	Odds Ratio	95% confidence interval
Predisposition a	1	0.67	0.013–6.329
Response b	0.1135	0.294	0.065–1.409
Organ Dysfunction c	0.1135	0.294	0.065–1.409
Total PIRO d	0.093	0.161	0.004–1.226

Significance limits: p-value ≤0.05

Legend: ^a Lower-half score ranging from 0 to 5: Non-survivors (N = 1); Survivors (N = 6); Upper-half score ranging from 6 to 10: Non-survivors (N = 13); Survivors (N = 52)

^b Lower-half score ranging from 0 to 6: Non-survivors (N = 9); Survivors (N = 50); Upper-half score ranging from 7 to 12: Non-survivors (N = 5); Survivors (N = 8)

^c Lower-half = 0: Non-survivors (N = 9); Survivors (N = 50); Upper-half score = 1: Non-survivors (N = 5); Survivors (N = 8)

^d Lower-half score ranging from 0 to 10: Non-survivors (N = 1); Survivors (N = 19); Upper-half score ranging from 11 to 20: Non-survivors (N = 13); Survivors (N = 39)