Table 4.
Age associations with the LDL-C levels in each age phase adjusted for confounding factors.
| Female | Male | |||||||
|---|---|---|---|---|---|---|---|---|
| Independent variable | Coef. | 95% CI | P | Independent variable | Coef. | 95% CI | P | |
| Age phase I: 18 ≤ age ≤ 56 | Age phase I: 18 ≤ age ≤ 33 | |||||||
| Age | 0.018 | 0.018~0.019 | <0.001 | Age | 0.025 | 0.021~0.030 | <0.001 | |
| Systolic BP | / | / | / | Systolic BP | / | / | / | |
| Diastolic BP | 0.004 | 0.002~0.007 | <0.001 | Diastolic BP | / | / | / | |
| Glucose (mmol/L) | 0.115 | 0.105~0.125 | <0.001 | Glucose (mmol/L) | 0.169 | 0.153~0.186 | <0.001 | |
| BMI (kg/m2) | 0.041 | 0.032~0.050 | <0.001 | BMI (kg/m2) | 0.071 | 0.055~0.087 | <0.001 | |
| Inactive lifestyle | 0.043 | 0.032~0.089 | <0.001 | Inactive lifestyle | 0.021 | 0.011~0.067 | <0.001 | |
| Moderate drinking | / | / | / | Moderate drinking | 0.031 | 0.012~0.071 | <0.001 | |
| Smoking | / | / | / | Smoking | 0.075 | 0.061~0.079 | 0.002 | |
| Age phase II: 34 ≤ age ≤ 56 | ||||||||
| Age | / | / | / | |||||
| Systolic BP | / | / | / | |||||
| Diastolic BP | 0.007 | 0.003~0.010 | <0.001 | |||||
| Glucose (mmol/L) | 0.030 | 0.022~0.037 | <0.001 | |||||
| BMI (kg/m2) | 0.035 | 0.023~0.048 | <0.001 | |||||
| Inactive lifestyle | 0.023 | 0.013~0.037 | 0.004 | |||||
| Moderate drinking | 0.061 | 0.054~0.201 | 0.003 | |||||
| Smoking | 0.103 | 0.108~0.232 | 0.001 | |||||
| Age phase II: age ≥ 57 | Age phase III: age ≥ 57 | |||||||
| Age | -0.013 | -0.016~-0.011 | 0.001 | Age | -0.008 | -0.010~-0.005 | <0.001 | |
| Systolic BP | / | / | / | Systolic BP | / | / | / | |
| Diastolic BP | 0.012 | 0.007~0.018 | <0.001 | Diastolic BP | 0.004 | 0.001~0.007 | 0.002 | |
| Glucose (mmol/L) | 0.051 | 0.019~0.083) | <0.001 | Glucose (mmol/L) | 0.038 | 0.026~0.050 | <0.001 | |
| BMI (kg/m2) | 0.024 | 0.010~0.038 | 0.002 | BMI (kg/m2) | 0.025 | 0.010~0.040 | <0.001 | |
| Inactive lifestyle | 0.021 | 0.016~0.037 | 0.007 | Inactive lifestyle | 0.034 | 0.020~0.043 | 0.004 | |
| Moderate drinking | / | / | / | Moderate drinking | 0.043 | 0.032~0.077 | 0.009 | |
| Smoking | / | / | / | Smoking | 0.023 | 0.016~0.052 | 0.008 | |
For abbreviations, see Table 1 and 2. In each multivariate linear regression model, potentially independent variables according to the univariable analysis (p<0.10, see Table 2) were introduced into the starting model and then eliminated manually using the backward step-by-step approach, depending on the largestP value. "/" indicates that a variable is not significantly associated with LDL-C level in given model.