The Indices of Instantaneous Pulse Rate Variability Are Indicators for Daily Life Quality Assessment in Patients with COPD

Table 6

Correlation between iPRV indices and each subquestion of CAT in phase B–phase A.

Variables	LF	HF	VHF	nLF^a	nHF^a	LF/HF	nLF^b	nHFb	nVHF^b
CAT1	−0.50	−0.61	−0.54	0.05	−0.05	0.10	0.14	−0.25	0.12
CAT2	−0.12	−0.39	−0.28	0.16	−0.16	0.24	0.12	−0.42	0.28
CAT3	0.09	0.02	0.03	0.15	−0.15	0.18	0.04	−0.27	0.17
CAT4	−0.07	−0.16	−0.10	0.07	−0.07	0.12	0.12	−0.15	0.25
CAT5	−0.53	−0.29	−0.29	−0.07	0.07	−0.11	−0.11	−0.25	0.37
CAT6	−0.32	−0.53	−0.54	0.42	−0.42	0.52	0.24	−0.43	0.13
CAT7	−0.35	−0.57	−0.59	0.27	−0.27	0.32	0.33	−0.18	−0.23
CAT8	0.12	−0.11	−0.05	0.09	−0.09	0.14	0.13	−0.23	0.03

p-value< 0.05.