BMC Medical Physics

Table 2 Univariate correlates with stress lung-heart-ratios (sLHR). Hemodynamic measurements were recorded at the time of tracer injection. Continuous variables were stratified according to the median.

From: Prognostic utility of sestamibi lung uptake does not require adjustment for stress-related variables: A retrospective cohort study

	Combined stress methods (n = 334)		Exercise stress only (n = 284)
	Mean sLHR	R value	Mean sLHR	R value
Sex
Male	0.31 ± 0.05^b	-0.16^b	0.31 ± 0.05^b	-0.16^b
Female	0.30 ± 0.05		0.30 ± 0.05
Age
> median (58 years)	0.30 ± 0.05 ^a	-0.17^b	0.30 ± 0.05^a	-0.19^c
< median	0.31 ± 0.05		0.31 ± 0.05
Heart rate
> median (135 BPM)	0.30 ± 0.05	-0.01	0.30 ± 0.05	-0.05
< median	0.30 ± 0.05		0.30 ± 0.05
Systolic BP
> median (175 mmHg)	0.30 ± 0.05^b	-0.11^a	0.30 ± 0.05^b	-0.15^a
< median	0.31 ± 0.05		0.31 ± 0.05
Diastolic BP
> median (85 mmHg)	0.30 ± 0.05	-0.06	0.31 ± 0.05	-0.09
< median	0.30 ± 0.05		0.30 ± 0.05
Stress method
Exercise only	0.30 ± 0.05	0.00	--	--
Dipyridamole^d	0.30 ± 0.04		--
Peak workload
> median (8.7 METS)	--	--	0.31 ± 0.05^a	0.15 ^a
< median	--		0.30 ± 0.05
Double product (SBP × HR)
> median (24,000)	--	--	0.30 ± 0.05^a	-0.12^a
< median	--		0.31 ± 0.05

^a P < 0.05, ^b P < 0.01, ^c P < 0.001, ^d dipyridamole alone or combined with supplemental exercise

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