Table 4.
Median respiratory syncytial virus (RSV) viral load by participant characteristics and regression coefficients and 95% confidence intervals (CI) from linear regression models
| Independent variable | Viral load (log10 copies/ml), median (IQR) | p-valuea | Adjusted linear regression modelsb, β (95% CI) | p-value |
|---|---|---|---|---|
| Age group | 0.79 | |||
| 18-49 | 4.36 (3.86-5.54) | Ref | ||
| 50-64 | 4.59 (3.31-5.40) | −0.20 (−0.98-0.57) | .45 | |
| ≥65 | 4.29 (3.54-4.86) | −0.31 (−1.13-0.51) | .60 | |
| BMI | 0.23 | |||
| Underweight/normal (18.5-24.99) | 5.00 (3.90-5.73) | Ref | ||
| Overweight (25-29.99) | 4.10 (3.18-4.75) | −0.70 (−1.55-0.15) | .11 | |
| Obese (≥ 30) | 4.55 (3.53-5.24) | −0.30 (−1.02-0.41) | .40 | |
| Charlson score | 0.07 | |||
| 0 | 4.33 (4.03-6.06) | Ref | ||
| 1 | 5.06 (4.05-5.33) | 0.36 (−0.86-1.59) | .56 | |
| 2 | 3.91 (3.53-4.41) | −0.84 (−2.05-0.38) | .17 | |
| ≥3 | 4.59 (3.28-5.40) | −0.18 (−1.28-0.91) | .74 |
Abbreviations: BMI, body mass index
a
P-value from Kruskal-Wallis test.
b
All models include the independent variable listed and viral load as the dependent variable adjusted for time between illness onset to specimen collection (in days).