Table 5.
Results of the logistic regression model for the association between the prevalence of serum antibodies to SARS-CoV-2 and symptoms while accounting for individual-level relevant characteristics (n = 1804)
| Predictor | Category/units | OR | 95% CI | P-value |
|---|---|---|---|---|
| Sex | Male | Ref. | ||
| Sex | Female | 0.90 | (0.70–1.15) | 0.398 |
| BMI | kg/m2 | 1.04 | (1.01–1.07) | 0.021 |
| Age | 5-yrs units | 0.96 | (0.93–1.00) | 0.046 |
| Symptom | No symptoms | Ref. | ||
| Fever | 3.22 | (2.20–4.71) | <0.001 | |
| Fever × age | 1.17 | (1.07–1.28) | 0.001 | |
| Weakness | 1.78 | (1.23–2.58) | 0.002 | |
| Weakness × age | 1.19 | (1.09–1.29) | <0.001 | |
| Pain in the limbs | 2.76 | (2.04–3.74) | <0.001 | |
| Loss of taste or smell | 10.47 | (7.30–15.01) | <0.001 | |
| Difficulty in breathing | 1.94 | (1.07–3.55) | 0.030 | |
| Chest pain | 0.53 | (0.31–0.90) | 0.018 | |
| Smoking habit | Never smoker | Ref. | ||
| Past smoker | 0.96 | (0.68–1.36) | 0.826 | |
| Current smoker | 0.28 | (0.18–0.44) | <0.001 | |
| Main activity | Other activity | Ref. | ||
| Accommodation and catering | 1.40 | (1.02–1.94) | 0.041 | |
| Healthcare and social services | 1.01 | (0.55–1.84) | 0.987 | |
| Student or not active | 1.04 | (0.78–1.37) | 0.812 | |
| Municipality | Ortisei | Ref. | ||
| Santa Cristina | 1.34 | (0.99–1.81) | 0.061 | |
| Selva | 1.38 | (1.05–1.82) | 0.020 | |
| Dietary supplements | No | Ref. | ||
| Yes | 0.51 | (0.34–0.75) | 0.001 | |
| Any drug regularly | No | Ref. | ||
| Yes | 0.64 | (0.46–0.89) | 0.008 |
Survey design adjusted odds ratios (ORs) (see Methods). 95% confidence intervals (95% CIs) and related adjusted P-values were obtained by linearised standard errors and logit transformation. BMI, body mass index.