Table 3. Multivariable models of the effect of body mass index (BMI) on chest x-ray findings of percentage of lung affected (linear regression), cavitation (logistic regression), and mycobacterial burden (negative binomial regression).
| Relative Percentage of Lung Affected | Cavitation | MGIT TTPa (hours) | ||||
|---|---|---|---|---|---|---|
| % Change | p-value | OR | p-value | RR | p-value | |
| (95%CI) | (95% CI) | (95% CI) | ||||
| Malnutrition | ||||||
| Severe | 11.1 | 0.002 | 4.6 | 0.03 | 0.99 | 0.93 |
| (4.0, 18.3) | (1.5, 14.1) | (0.9, 1.2) | ||||
| Moderate | 2.4 | 0.45 | 1.9 | 0.75 | 0.97 | 0.93 |
| (-3.8, 8.6) | (0.8, 4.3) | (0.8,1.1) | ||||
| Normal/Overweight | Ref | Ref | Ref | |||
| Diabetes | ||||||
| Yes | -7.1 | 0.02 | ||||
| (-13.1,-1.0) | ||||||
| No | Ref | |||||
| Cavitation | ||||||
| Yes | 12.2 | 0.0001 | ||||
| (6.0,18.5) | ||||||
| No | Ref | |||||
| Smoker | ||||||
| Current | 0.4 | 0.01 | 0.8 | 0.009 | ||
| (0.2, 0.9) | (0.7, 1.0) | |||||
| Former | 0.6 | 0.12 | 0.98 | 0.84 | ||
| (0.4, 2.4) | (0.8, 1.2) | |||||
| Never | Ref | Ref | ||||
aMGIT TTP = mycobacterial growth indicator tube time to positive.