Table 2. Prevalence of pneumonia according to the age and vaccination status of COVID-19 patients.

Age groups	All patients	Non-vaccinated	Incomplete primary vaccine series	Complete primary vaccine series	P value
12–19 yr (n = 72)	2 (2.8)	1/18 (5.6)	0/7 (0.0)	1/47 (2.1)	0.577
20–29 yr (n = 175)	15 (8.6)	8/28 (28.6)	0/9 (0.0)	7/138 (5.1)	0.001
30–39 yr (n = 127)	25 (19.7)	12/36 (33.3)	0/4 (0.0)	13/87 (14.9)	0.056
40–49 yr (n = 205)	53 (25.9)	32/52 (61.5)	3/15 (20.0)	18/138 (13.0)	< 0.001

Data are presented as the number of patients (%).

COVID-19 = coronavirus disease 2019.