Table 3.
Multivariate linear regression analysis of factors associated with disposition index, QUICKI, and Matsuda index.
| Variables | Disposition index | QUICKI | Matsuda index | |||
|---|---|---|---|---|---|---|
| β (SE) | adjusted R2 | β (SE) | adjusted R2 | β (SE) | adjusted R2 | |
| Model 1 | 0.15 | 0.22 | 0.25 | |||
| Nap duration (≤1 hr=0, >1 hr=1) | 0.003 (0.05) | -0.135 (0.01)** | -0.119 (0.04)* | |||
| Model 2 | 0.15 | 0.20 | 0.24 | |||
| Nocturnal sleep duration | -0.009 (0.10) | -0.020 (0.02) | -0.043 (0.08) | |||
| Model 3 | 0.14 | 0.19 | 0.23 | |||
| SDNN | 0.001 (0.17) | 0.118 (0.03)* | 0.093 (0.14) | |||
| Model 4 | 0.15 | 0.21 | 0.26 | |||
| Nap duration (≤1 hr=0, >1 hr=1) | 0.001 (0.06) | -0.141 (0.01)** | -0.135 (0.05)* | |||
| Nocturnal sleep duration | -0.009 (0.11) | -0.049 (0.02) | -0.072 (0.08) | |||
| Model 5 | 0.14 | 0.21 | 0.24 | |||
| Nap duration (≤1 hr=0, >1 hr=1) | 0.007 (0.06) | -0.129 (0.01)* | -0.116 (0.05)* | |||
| SDNN | 0.002 (0.18) | 0.098 (0.03) | 0.075 (0.14) | |||
| Model 6 | 0.13 | 0.20 | 0.25 | |||
| Nap duration (≤1 hr=0, >1 hr=1) | 0.009 (0.06) | -0.127 (0.01)* | -0.123 (0.05)* | |||
| Nocturnal sleep duration | 0.004 (0.11) | -0.024 (0.02) | -0.060 (0.09) | |||
| SDNN | 0.008 (0.18) | 0.112 (0.03)* | 0.099 (0.14) | |||
Standard beta coefficient and standard error (SE) values are shown. For multivariate linear regression analyses, the covariates included age, gender, body mass index, current smoker, alcohol consumption, hypertension, dyslipidemia, and HbA1c. Model 1 includes Nap duration, Model 2 Nocturnal sleep duration, Model 3 SDNN, Model 4 Nap duration and Nocturnal sleep duration, Model 5 Nap duration and SDNN, and Model 6 Nap duration, Nocturnal sleep duration and SDNN, in addition to other covariates already noted. SDNN, standard deviation of NN(RR) interval. *p<0.05, **p<0.01.