Table 3.

Odds ratio of blood culture positivity

	Total (N = 366)			Age 18 to 79 (N = 192)			Age above 80 (N = 174)
	Unadjusted odds ratio (95% C.I.)	Adjusted odds ratio (95% C.I.)	p value	Unadjusted odds ratio (95% C.I.)	Adjusted odds ratio (95% C.I.)	p value	Unadjusted odds ratio (95% C.I.)	Adjusted odds ratio (95% C.I.)	p value
Shaking chills	3.21 (1.96-5.27)	2.53 (1.50-4.28)	0.001*	2.57 (1.30-5.09)	2.22 (1.09-4.51)	0.028*	5.06 (2.36-10.84)	3.06 (1.30-7.19)	0.010*
Prior antibiotics use within 48 hours	0.23 (0.09-0.56)	0.31 (0.12-0.76)	0.011*	0.07 (0.009-0.54)	0.08 (0.01-0.68)	0.020*	0.43 (0.15-1.19)	0.66 (0.22-1.94)	0.456
Respiratory rate above 25/min	1.74 (1.01-3.00)	1.46 (0.81-2.61)	0.203	1.35 (0.57-3.18)	1.30 (0.52-3.23)	0.562	2.07 (1.00-4.27)	1.31 (0.54-2.97)	0.515
Body temperature above 38.5°C	2.64 (1.62-4.32)	1.93 (1.14-3.28)	0.014*	1.57 (0.79-3.10)	1.40 (0.68-2.88)	0.348	4.93 (2.39-10.18)	2.98 (1.30-6.83)	0.010*

CI, confidence interval.

*p<0.05.