Table 1

 Characteristics of the study subpopulations

CharacteristicCardiovascularRespiratory
TG, temperature gradient; SD, standard deviation; CI, confidence interval.
No. of patients2125
Male:female ratio7:1410:15
Age, mean (range)74 (46 to 90)69 (45 to 93)
TG
    Mean (range)8.67 (5.1 to 12.1)4.88 (2.2 to 11.3)
    SD (95% CI)2.16 (7.75 to 9.59)2.20 (4.02 to 5.74)