Table 4.

Relationship between clinical parameters and coronary microvascular function (mean ± SD)

Parameters	ACh-induced increase in CBF	P value	CFR	P value
Age (yr)	r = 0.188	NS	r = 0.204	NS
Disease period (mo)	r = -0.016	NS	r = -0.260	NS
Current smoking
(+, n = 12)	54.5 ± 14.0	NS	3.1 ± 0.6	NS
(-, n = 24)	54.4 ± 9.9		3.3 ± 0.8
Diffuse spasm
(+, n = 23)	60.8 ± 49.9	NS	3.2 ± 0.6	NS
(-, n = 13)	43.2 ± 43.3		3.3 ± 0.9
Distal spasm
(+, n = 20)	57.0 ± 49.3	NS	3.2 ± 0.7	NS
(-, n = 16)	51.3 ± 47.2		3.3 ± 0.8
Multi-vessel spasm
(+, n = 7)	41.8 ± 26.4	NS	3.1 ± 0.7	NS
(-, n = 29)	57.5 ± 51.5		3.3 ± 0.7

ACh: Acetylcholine; CFR: Coronary flow reserve; NS: Not significant; CBF: Coronary blood flow.