Table 5.

Side effects of influenza vaccination in the intradermal (ID) group (n = 67) and the intramuscular (IM) group (n = 67).

Side effects		ID n (%)	IM n (%)	P-value
Local	Erythema	67 (100.0)	34 (50.7)	< 0.001*
	Itching	18 (26.9)	1 (1.5)	< 0.001*
	Swelling	66 (98.5)	11 (16.4)	< 0.001*
	Ecchymosis	16 (23.9)	2 (3.0)	0.001*
Systemic	Fever	0 (0)	2 (3.0)	< 0.001*
	Myalgia	1 (1.5)	4 (6.0)	0.43
	Headache	0 (0)	3 (4.5)	< 0.001*

^*Statistically significant at P < 0.05