Table 3.

ECG change of patients in different anxiety groups in the peri-injection period with 5-min intervals

	Mild (< 9) (n = 54)		Moderate (9–12) (n = 30)		Severe (> 12) (n = 16)		p valuea
	N	%	N	%	N	%
DAS score
Preinjection
Normal	48	88.89	24	80	7	43.75	.24
With abnormal findings	6	11.11	6	20	9	56.25
Sinus tachycardia	0	0	2	6.67	9	56.25
Sinus bradycardia	6	11.11	4	13.33	0	0
Injection
Normal	49	90.74	24	80	6	37.5
With abnormal findings	5	9.26	6	20	10	62.5
Sinus tachycardia	0	0	3	10	10	62.5
Sinus bradycardia	5	9.26	3	10	0	0	< .01
5 min
Normal	50	92.59	25	83.33	5	31.25	.03
With abnormal findings	4	7.41	5	16.67	11	68.75
Sinus tachycardia	0	0	4	13.33	11	68.75
Sinus bradycardia	4	7.41	1	3.33	0	0
10 min
Normal	50	92.59	26	86.67	7	43.75	.49
With abnormal findings	4	7.41	4	13.33	9	56.25
Sinus tachycardia	0	0	3	10	9	56.25
Sinus bradycardia	4	7.41	1	3.33	0	0
15 min
Normal	49	90.74	25	83.33	7	43.75	.27
With abnormal findings	5	9.26	5	16.67	9	56.25
Sinus tachycardia	0	0	3	10	9	56.25
Sinus bradycardia	5	9.26	2	6.67	0	0

Bold indicates the significant of p value ( p < 0.05)

^aKruskal–Wallis test