Table 2.
Multivariable linear regression analysis assessing the strength of the association between the attenuation coefficient and controlled attenuation parameter
| Variable | Univariable analysis |
Multivariable analysis |
|||||
|---|---|---|---|---|---|---|---|
| Regression coefficient (standard error) | 95% CI | P-value | Regression coefficient (standard error) | 95% CI | P-value | ||
| Main factor | |||||||
| Attenuation coefficient (dB/cm/MHz) | 279.900 (31.410) | 217.231 to 342.573 | <0.001 | 299.815 (33.717) | 232.437 to 367.192 | <0.001 | |
| Covariates | |||||||
| Age (year) | 3.235 (1.963) | -0.680 to 7.151 | 0.104 | ||||
| Sex | |||||||
| Female | Reference category | Reference category | |||||
| Male | 27.240 (13.420) | 0.455 to 54.016 | 0.046 | 23.527 (9.652) | 4.240 to 42.814 | 0.018 | |
| BMI (kg/m2) | 1.982 (1.373) | -0.758 to 4.721 | 0.153 | ||||
| <30 kg/m2 | Reference category | ||||||
| ≥30 kg/m2 | 21.049 (13.721) | -6.339 to 48.437 | 0.130 | ||||
| BMI percentile | |||||||
| Normal (<85th percentile) | Reference category | Reference category | |||||
| Overweight (85th–94th percentile) | 26.910 (17.980) | -8.991 to 62.819 | 0.139 | -3.691 (12.429) | -28.529 to 21.147 | 0.768 | |
| Obesity (95th–98th percentile) | 25.030 (22.430) | -19.748 to 69.815 | 0.268 | -1.583 (15.198) | -31.953 to 28.787 | 0.917 | |
| Severe obesity (≥99th percentile) | 17.630 (15.360) | -13.035 to 48.285 | 0.255 | 14.952 (10.494) | -6.018 to 35.922 | 0.159 | |
| ALT (IU/L) | 0.085 (0.061) | -0.036 to 0.207 | 0.166 | -0.066 (0.044) | -0.155 to 0.023 | 0.144 | |
| AST (IU/L) | 0.102 (0.142) | -0.182 to 0.385 | 0.476 | ||||
| r-GT (IU/L) | 0.199 (0.170) | –0.145 to 0.542 | 0.249 | ||||
| Fasting glucose (mg/dL) | 0.550 (0.534) | –0.516 to 1.616 | 0.307 | ||||
| Triglycerides (mg/dL) | 0.026 (0.091) | –0.155 to 0.208 | 0.773 | ||||
| LDL (mg/dL) | -0.042 (0.214) | –0.471 to 0.387 | 0.845 | ||||
| HDL (mg/dL) | -0.028 (0.596) | –1.219 to 1.162 | 0.962 | ||||
CI, confidence interval; BMI, body mass index; AST, aspartate transaminase; ALT, alanine transaminase; r-GT, gamma-glutamyl transferase; LDL, low-density lipoprotein; HDL, high-density lipoprotein.