Table 3.
Age, sex, and smoking history-adjusted risk of reporting a chest illness, including the characteristics listed for each model (n=244)
| Characteristic | Relative Risk | 95% CI | P value |
|---|---|---|---|
| Past chest illness, FEV1/FVC, vitamin D in categories | |||
| Pneumonia/Bronchitis since SCI | |||
| Yes and with chest illness in last 3 years | 7.16 | 3.22, 15.92 | <0.001 |
| Yes and without chest illness in last 3 years | 2.69 | 1.21, 5.98 | 0.02 |
| No and with chest illness last 3 years | 1.56 | 0.49, 4.99 | 0.45 |
| Vitamin D (ng/ml) | |||
| <20 (deficient) | 1.18 | 0.63, 2.21 | 0.60 |
| ≥20 – <30 (insufficient) | 1.01 | 0.60, 1.69 | 0.97 |
| ≥ 30 (sufficient) | Ref | Ref | Ref |
| FEV1/FVC (per SD=0.10) | 0.80 | 0.65, 0.99 | 0.04 |
| Past chest illness (not shown), FEV1/FVC, vitamin D in quartiles | |||
| Vitamin D (ng/ml) | |||
| <19.9 | 1.21 | 0.66, 2.23 | 0.54 |
| ≥19.9 – ≤24.0 | 1.18 | 0.61, 2.28 | 0.62 |
| >24.0 – ≤29.5 | 0.88 | 0.45, 1.74 | 0.72 |
| >29.5 | Ref | Ref | Ref |
| FEV1/FVC (per SD=0.10) | 0.80 | 0.65, 0.99 | 0.04 |
| Past chest illness (not shown), FEV1/FVC, vitamin D continuous | |||
| Vitamin D per 20 ng/ml | 0.74 | 0.47, 1.17 | 0.20 |
| FEV1/FVC (per SD=0.10) | 0.81 | 0.65, 1.00 | 0.05 |
| Past chest illness, %-predicted FEV1, vitamin D in categories | |||
| Pneumonia/Bronchitis since SCI | |||
| Yes and with chest illness in last 3 years | 7.51 | 3.10, 18.17 | <0.001 |
| Yes and without chest illness in last 3 years | 2.63 | 1.16, 5.97 | 0.02 |
| No and with chest illness last 3 years | 1.71 | 0.54, 5.40 | 0.36 |
| Vitamin D (ng/ml) | |||
| <20 (deficient) | 1.18 | 0.62, 2.24 | 0.62 |
| ≥20 – <30 (insufficient) | 1.00 | 0.60, 1.66 | 1.00 |
| ≥ 30 (sufficient) | Ref | Ref | Ref |
| %-predicted FEV1 (per SD=20.4) | 0.92 | 0.67, 1.26 | 0.60 |
| Past chest illness (not shown), %-predicted FEV1, vitamin D in quartiles | |||
| Vitamin D (ng/ml) | |||
| <19.9 | 1.21 | 0.64, 2.27 | 0.56 |
| ≥19.9 – ≤24.0 | 1.19 | 0.61, 2.33 | 0.61 |
| >24.0 – ≤29.5 | 0.85 | 0.44, 1.65 | 0.63 |
| >29.5 | Ref | Ref | Ref |
| %-predicted FEV1 (per SD=20.4) | 0.93 | 0.68, 1.28 | 0.67 |
| Past chest illness (not shown), %-predicted FEV1, vitamin D continuous | |||
| Vitamin D per 20 ng/ml | 0.74 | 0.47, 1.17 | 0.20 |
| %-predicted FEV1 (per SD=20.4) | 0.92 | 0.68, 1.25 | 0.60 |
| Past chest illness, %-predicted FVC, vitamin D in categories | |||
| Pneumonia/Bronchitis since SCI | |||
| Yes and with chest illness in last 3 years | 8.12 | 3.48, 18.97 | <0.001 |
| Yes and without chest illness in last 3 years | 2.89 | 1.28, 6.51 | 0.01 |
| No and with chest illness last 3 years | 1.64 | 0.55, 4.92 | 0.38 |
| Vitamin D (ng/ml) | |||
| <20 (deficient) | 1.17 | 0.63, 2.18 | 0.62 |
| ≥20 – <30 (insufficient) | 1.02 | 0.61, 1.70 | 0.94 |
| ≥ 30 (sufficient) | Ref | Ref | Ref |
| %-predicted FVC (per SD=19.1) | 1.02 | 0.75, 1.40 | 0.88 |
| Past chest illness (not shown), %-predicted FVC, vitamin D in quartiles | |||
| Vitamin D (ng/ml) | |||
| <19.9 | 1.20 | 0.65, 2.20 | 0.56 |
| ≥19.9 – ≤24.0 | 1.22 | 0.62, 2.39 | 0.56 |
| >24.0 – ≤29.5 | 0.86 | 0.44, 1.69 | 0.66 |
| >29.5 | Ref | Ref | Ref |
| %-predicted FVC (per SD=19.1) | 1.04 | 0.76, 1.43 | 0.81 |
| Past chest illness (not shown), %-predicted FVC, vitamin D continuous | |||
| Vitamin D per 20 ng/ml | 0.74 | 0.47, 1.17 | 0.20 |
| %-predicted FVC (per SD=19.1) | 1.02 | 0.76, 1.39 | 0.88 |