Table 4.

Average systolic blood pressure (BP, in mm Hg), diastolic blood pressure, O₂ saturation (SpO₂) and heart rate (in beats/min) of patients in different reporting pain groups in the peri-injection period with 5-min intervals

	YES (1) N = 38		NO (2) N = 62		P valuea
	Mean	SD	Mean	SD
Pain during injection
Heart rate
Preinjection	74.66	13.302	73.87	11.733	0.23
Injection	80.84	11.698	76.10	12.706	< 0.01
5 min	79.42	12.116	75.79	14.140	0.03
10 min	76.39	11.315	74.11	11.620	0.43
15 min	76.12	11.056	73.21	12.718	0.54
Systolic BP
Preinjection	127.21	12.641	125.44	11.466	0.65
Injection	132.42	13.377	127.35	11.516	0.04
5 min	129.13	12.493	127.11	12.159	0.58
10 min	128.53	13.264	126.81	11.742	0.75
15 min	127.98	10.770	126.56	12.019	0.45
Diastolic BP
Preinjection	78.18	9.926	77.00	7.951	0.58
Injection	80.45	10.058	78.89	8.997	0.06
5 min	79.97	9.844	78.16	9.244	0.06
10 min	78.57	8.719	77.13	9.038	0.07
15 min	78.15	8.877	77.58	9.666
SpO 2
Preinjection	97.53	1.330	97.63	1.105	0.67
Injection	95.84	1.994	95.92	2.098	0.56
5 min	96.11	2.141	96.23	1.979	0.35
10 min	96.82	1.706	96.74	1.669	0.08
15 min	97.18	1.291	97.32	1.388	0.26

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

^aChi-square test