Table 4.
Prevalence of general side effects after the first dose of the Sinopharm COVID-19 vaccination among 2 groups of participants (≤49 years old vs >49 years old) (n 1080)
| Side effect | ≤49 years (844) n (%) | >49 years (236) n (%) | Total (1080) n (%) | P-value |
|---|---|---|---|---|
| Normal pain at the vaccination site | 356 (42.2) | 100 (42.4) | 456 (42.2) | 0.999 |
| Severe pain at the vaccination site | 12 (1.4) | 16 (6.8) | 28 (2.6) | 0.023 |
| Tenderness | 44 (5.2) | 12 (5) | 56 (5.1) | 0.963 |
| Redness | 8 (0.9) | 0 | 8 (0.7) | 0.452 |
| Induration and pruritus at the vaccination site | 12 (1.4) | 0 | 12 (1.1) | 0.356 |
| Fever | 8 (0.9) | 4 (1.7) | 12 (1.1) | 0.631 |
| Headache | 92 (10.9) | 12 (5) | 104 (9.6) | 0.178 |
| Fatigue | 96 (11.4) | 36 (15.3) | 132 (12.2) | 0.429 |
| Nausea | 4 (0.5) | 12(5) | 16 (1.5) | 0.010 |
| Diarrhea | 8 (0.9) | 0 | 8 (0.74) | 0.452 |
| Cough | 8 (0.9) | 4 (1.7) | 12 (1.1) | 0.631 |
| Allergy | 8 (0.9) | 4 (1.7) | 12(1.1) | 0.631 |
| Muscle pain | 36 (4.3) | 32 (13.6) | 68 (6.3) | 0.010 |
| Abdominal pain | 12 (1.4) | 8 (3.4) | 20 (1.85) | 0.324 |
| Back pain | 24 (2.8) | 20 (8.5) | 44 (4.07) | 0.054 |
| Lethargy | 76 (9) | 24 (10) | 100 (9.2) | 0.631 |
| Other | 12 (1.4) | 0 | 8 (0.7) | 0.452 |
| None | 220 (26.0) | 44 (18.6) | 264 (24.4) | 0.234 |