Table 3.

Factors associated with Delta and Omicron variant pneumonia.

Variable		Delta variant				Omicron variant
	Pneumonia	OR	p value	Adjusted OR	p value	Pneumonia	OR	p value	Adjusted OR	p value
	N (%)	(95% CI)		(95% CI)		N (%)	(95% CI)		(95% CI)
Gender
Female	122(52.1)	Ref		Ref		44(18.4)	Ref		Ref
Male	76(44.4)	0.73 (0.49–1.09)	0.127	0.72 (0.46–1.13)	0.153	36(19.8)	1.09 (0.67–1.78)	0.723	1.27 (0.76–2.14)	0.359
Age Group (years)
<18	4(6.7)	Ref		Ref		26(13.4)	Ref		Ref
18–49	79(45.1)	11.52 (4.00–33.15)	<0.0001	10.16(3.39–30.43)	<0.0001	33(19.2)	1.53 (0.88–2.69)	0.135	0.99 (0.5–1.89)	0.963
≥50	115(67.7)	29.27 (10.10–84.80)	<0.0001	25.70(8.56–77.10)	<0.0001	21(38.2)	3.99 (2.02–7.90)	<0.0001	1.45 (0.56–3.63)	0.433
Comorbidities
No	163(46.3)	Ref		Ref		65(16.7)	Ref		Ref
Yes	35(66.0)	2.25 (1.23–4.13)	0.001	1.33 (0.67–2.65)	0.423	15(46.9)	4.40 (2.09–9.25)	<0.0001	2.95 (1.16–7.63)	0.024
Vaccination Status
Full primary ≥180 days	83(69.2)	Ref		Ref		29(36.7)	Ref		Ref
Full primary <180 days	95(43.2)	0.34 (0.21–0.54)	<0.0001	0.48 (0.28–0.81)	0.006	49(14.8)	0.30 (0.17–0.52)	<0.0001	0.34 (0.17–0.67)	0.002
Booster dose	20(30.8)	0.20 (0.10–0.38)	<0.0001	0.18 (0.09–0.35)	<0.0001	2(20.0)	–	–	–

Note: *Indicates that the number of cases is too small to make a valid estimate.