Table 3.
Adjusted and Unadjusted Models for Lung Function and BMI at 6 Years of Age by Insurance Status
| Unadjusted Model* | Adjusted Model 1** | Adjusted Model 2*** | |||||
|---|---|---|---|---|---|---|---|
| β value (95% C.I.) |
P value | β value (95% C.I.) |
P value | β value (95% C.I.) |
P value | ||
|
FEV1pp (Max. 6yo; n=5,961) |
Always Private | 0.0 | - | 0.0 | - | 0.0 | - |
| Intermittent Private | −3.3 (−4.3, −2.2) |
<0.001 | −2.6 (−3.6, −1.6) |
<0.001 | −1.9 (−3.0, −0.8) |
0.001 | |
| Exclusively Public | −6.6 (−7.7, −5.6) |
<0.001 | −5.8 (−6.9, −4.8) |
<0.001 | −4.4 (−5.6, −3.2) |
<0.001 | |
|
FEV1pp (Mean 6yo; n=5,961) |
Always Private | 0.0 | - | 0.0 | - | 0.0 | - |
| Intermittent Private | −3.9 (−4.9, −2.9) |
<0.001 | −2.9 (−4.0, −1.9) |
<0.001 | −2.1 (−3.2, −1.0) |
<0.001 | |
| Exclusively Public | −7.6 (−8.7, −6.6) |
<0.001 | −6.4 (−7.4, −5.3) |
<0.001 | −4.6 (−5.8, −3.4) |
<0.001 | |
|
FEV1pp variability (Max. 6yo – min. 6yo; n=5,480) |
Always Private | 0.0 | - | 0.0 | - | 0.0 | - |
| Intermittent Private | 1.7 (0.8, 2.5) |
<0.001 | 1.1 (0.3, 2.0) |
0.010 | 0.8 (−0.1, 1.7) |
0.10 | |
| Exclusively Public | 2.3 (1.5, 3.1) |
<0.001 | 1.5 (0.6, 2.4) |
0.001 | 0.8 (−0.2, 1.8) |
0.13 | |
|
Maximum BMI (Percentile; 6,342) |
Always Private | 0.0 | - | 0.0 | - | 0.0 | - |
| Intermittent Private | 0.0 (−1.4, 1.4) |
0.99 | 0.0 (−1.4, 1.4) |
0.98 | 0.2 (−1.3, 1.6) |
0.84 | |
| Exclusively Public | 0.7 (−0.7, 2.0) |
0.32 | 0.1 (−1.3, 1.5) |
0.87 | 0.5 (−1.2, 2.1) |
0.58 | |
|
Mean BMI (Percentile; 6,342) |
Always Private | 0.0 | - | 0.0 | - | 0.0 | - |
| Intermittent Private | −1.0 (−2.5, 0.4) |
0.16 | −0.6 (−2.0, 0.9) |
0.43 | −0.5 (−2.1, 1.0) |
0.49 | |
| Exclusively Public | −0.7 (−2.2, 0.7) |
0.31 | −0.7 (−2.2, 0.7) |
0.32 | −0.5 (−2.2, 1.2) |
0.56 | |
Unadjusted model includes FEV1pp measure or BMI percentile as the dependent variable and insurance status as a dummy variable with the “always private insurance” set as the reference group.
Adjusted model 1 adds demographic and clinical covariates of cohort (year of birth), sex, age at diagnosis, race, ethnicity, number of F508del CFTR variants (dummy variable), exocrine pancreatic status, presence of feeding tube by 6 years of age, any MRSA, and any Pa to the unadjusted model.
Adjusted model 2 adds other SES covariates of log of estimated median household income at birth and highest level of maternal education (dummy variable) at 6yo to adjusted model 1.