The Effect of Guided Imagery on Stress and Fatigue in Patients with Thyroid Cancer Undergoing Radioactive Iodine Therapy

Table 5

Heart rate variability between experimental and control groups according to time intervals (𝑁=84).

HRV	Time	Exp. (𝑛=44)	Con. (𝑛=40)	Source	𝐹	𝑃
		M ± SD	M ± SD
SDDN	Baseline	23.06±8.00	25.94±11.77	Group	0.73	0.397
	3 weeks later	29.30±10.57	28.69±10.76	Time	9.74	<0.001
	4 weeks later	32.82±9.85	26.50±7.98	Group * Time	6.68	0.002
TP	Baseline	5.84±0.76	5.95±0.90	Group	2.24	0.138
	3 weeks later	6.35±0.80	6.25±0.86	Time	10.82	<0.001
	4 weeks later	6.60±0.67	6.05±0.64	Group * Time	5.29	0.006
LF	Baseline	4.41±0.96	4.54±1.16	Group	1.11	0.296
	3 weeks later	4.91±0.90	4.87±1.02	Time	5.57	0.005
	4 weeks later	5.05±0.99	4.45±0.80	Group * Time	4.58	0.012
HF	Baseline	4.16±1.15	4.21±1.22	Group	4.11	0.046
	3 weeks later	4.40±1.05	4.03±1.07	Time	4.82	0.009
	4 weeks later	4.95±1.01	4.22±1.08	Group * Time	3.71	0.026

SDNN: standard deviation of all NN intervals; TP: total power; LF: low frequency; HF: high frequency.