Table 2.
Clinical Picture of Covid-19 at Onset
| Covid-19 cases | p-value | |||
|---|---|---|---|---|
| All (N = 1279) | Current smokers (N = 472) | Former/never smokers (N = 807) | ||
| Mean symptom duration (days, 95% CI)* | 9.5 (9.08–9.88) | 9.10 (8.63–9.56) | 9.70 (9.20–10.20) | .15 |
| Asymptomatic infection—no. (%) | 172 (13) | 68 (14) | 104(13) | .22 |
| Symptom†—no. (%) | ||||
| Headache | 666 (52) | 226 (48) | 440 (55) | <.001 |
| Anosmia | 614 (48) | 212 (45) | 383 (47) | .20 |
| Asthenia | 575 (45) | 192 (41) | 383 (47) | <.001 |
| Myalgias | 523 (41) | 172 (36) | 351 (43) | <.001 |
| Ageusia | 499 (39) | 186 (39) | 313 (39) | .19 |
| Dyspnea | 437 (34) | 120 (25) | 317 (39) | <.001 |
| Rhinitis | 322 (25) | 119 (25) | 203 (25) | .29 |
| Fever | 322 (25) | 88 (19) | 234 (29) | <.001 |
| Cough | 286 (22) | 93 (20) | 193 (24) | <.001 |
*Patients with persistent clinical signs were censored on the date of the second RT-PCR.
†Symptoms listed were reported by at least 10% of the patients.
95% CI, 95% confidence interval.