TABLE 2.
Risk factors for negative anti-SARS-CoV-2 antibody in adjusted and unadjusted Cox regression modelsa
| Characteristic | Unadjusted HR (95% CI) | P value | Adjusted HR (95% CI) | P value |
|---|---|---|---|---|
| BMI | ||||
| <25 | 1.0 (reference) | |||
| 25–30 | 1.4 (0.50 to 3.8) | 0.618 | 1.4 (0.52–4.0)b | 0.484 |
| >30 | 3.0 (1.0–8.6) | 0.043 | 3.1 (1.1–8.8)c | 0.039 |
| Severity of disease | ||||
| Clinically symptomatic and bedridden at home or at hospital | 1.0 (reference) | |||
| No clinical symptom or clinically symptomatic but quite well at home | 7.0 (2.7–18) | <0.001 | 6.6 (2.6–17)c | <0.001 |
a
BMI, body mass index; CI, confidence interval; HR, hazard ratio.
b
Adjusted for severity of disease and age.
c
Adjusted for BMI category and age.