| Number (%) of patients | Number (%) of improved patients | Odds ratio | 95% CI | P-value |
---|---|---|---|---|---|
Headache | 862 (78.2) | 451 (52.3) | 2.60 | 0.87–4.51 | > 0.05 |
Dazzling | 501 (45.4) | 378 (75.4) | 6.39 | 3.45–11.92 | < 0.001 |
Cervical stiffness | 839 (76.1) | 591 (70.4) | 12.76 | 8.05–21.42 | < 0.001 |
Cardiovascular disorders | 256 (23.2) | 162 (63.3) | 4.65 | 0.71–8.87 | > 0.05 |
Gastrointestinal disorders | 654 (59.3) | 423 (64.7) | 3.79 | 0.93–6.90 | > 0.05 |