Table 2. The association of commonest side effects of Pfizer vaccine (first dose) with age, gender, and comorbidities .

*p-value significant as <0.05

Variable		Fever			Pain at the injection site
		Yes, n(%)	No, n(%)	p-value	Yes, n(%)	No, n(%)	p-value
Age group	<30 years	176(88.0%)	124(62.0%)	<0.001*	76(38.0%)	124(62.0%)	<0.001*
	31-50 years	297(56.6%)	196(37.3%)		329(62.7%)	196(37.3%)
	>50 years	227(82.5%)	48(17.5%)		227(82.5%)	48(17.5%)
Gender	Male	400(62.1%)	244(37.0%)	<0.001*	380(59.0%)	264(41.0%)	<0.001*
	Female	300(84.3%)	56(15.7%)		252(70.8%)	104(29.2%)
Hypertension	Present	180(64.3%)	100(35.7%)	0.017*	208(74.3%)	72(25.7%)	<0.001*
	Absent	520(72.2%)	200(27.8%)		424(58.9%)	296(41.1%)
Diabetes mellitus	Present	232(65.2%)	124(34.8%)	0.016*	260(73.0%)	96(27.0%)	<0.001*
	Absent	468(72.7%)	176(27.3%)		372(57.8%)	272(42.2%)