Table 3.
Multiple linear regression model with FD and OSAS severity classification.
| Model 1 | Model 2 | Model 3 | ||||
|---|---|---|---|---|---|---|
| Group | B (95% CI) | P | B (95% CI) | P | B (95% CI) | P |
| FDa | ||||||
| Low | – | – | – | |||
| Middle | −0.003 (−0.012, 0.005) | .435 | −0.004 (−0.013, 0.004) | .317 | −0.003 (−0.012, 0.007) | .59 |
| High | −0.011 (−0.020, −0.002) | .013 | −0.013 (−0.022, −0.004) | .006 | −0.013 (−0.024, −0.003) | .012 |
| P for trend | .012 | .005 | .013 | |||
| FDab | ||||||
| Low | – | – | – | |||
| Middle | −0.004 (−0.014, 0.005) | .353 | −0.005 (−0.015, 0.004) | .254 | −0.003 (−0.013, 0.007) | .514 |
| High | −0.012 (−0.021, −0.002) | .014 | −0.013 (−0.023, −0.004) | .007 | −0.013 (−0.024, −0.002) | .019 |
| P for trend | .013 | .007 | .021 | |||
| FDvb | ||||||
| Low | – | – | – | |||
| Middle | −0.004 (−0.012, 0.005) | .403 | −0.005 (−0.013, 0.004) | .286 | −0.003 (−0.013, 0.006) | .489 |
| High | −0.010 (−0.018, −0.001) | .034 | −0.011 (−0.020, −0.003) | .012 | −0.014 (−0.024, −0.004) | .008 |
| P for trend | .033 | .008 | .012 | |||
aModel 1: adjusted for age and sex; model 2: adjusted for age, sex, smoking, hypertension, diabetes, and hyperlipidemia; model 3: adjusted for age, sex, smoking, hypertension, diabetes, hyperlipidemia, BMI, triglycerides, uric acid, FBG, and HbA1c. bModel 1: adjusted for age and sex; model 2: adjusted for age, sex, smoking, hypertension, diabetes, and hyperlipidemia; model 3: adjusted for age, sex, smoking, hypertension, diabetes, hyperlipidemia, BMI, FBG, and HbA1c. BMI = body mass index, CI = confidence interval, FBG = fasting blood glucose, FD = fractal dimension, FDa = fractal dimension arteriole, FDv = fractal dimension venule, HbA1c = glycated hemoglobin, OSAS = obstructive sleep apnea syndrome.