Table 3.
Results of metaregression analysis.
| Coef. | 95% CI | t value | P value | |||
|---|---|---|---|---|---|---|
| Continuous variable | ||||||
| Publication year | 0.053 | (-0.219, 0.113) | -0.69 | 0.501 | ||
| Study length | 0.005 | (-0.128, 0.137) | 0.08 | 0.937 | ||
| Age of mice | 0.290 | (-0.792, 0.213) | -1.25 | 0.234 | ||
| Binary variable | ||||||
| Source of curcumin | 1.026 | (-2.361, 0.310) | -1.67 | 0.120 | ||
| Gender of mice | 0.519 | (-1.154, 2.192) | 0.68 | 0.512 | ||
| Staining methods | 0.545 | (-1.817, 1.009) | -0.62 | 0.545 | ||
| Multicategorical variable∗ | ||||||
| Assessing location | Arch | 0.717 | (-2.818, 1.384) | -0.76 | 0.465 | 0.7276 |
| Sinus | 0.695 | (-2.770, 1.379) | -0.75 | 0.472 | ||
| Whole | 0.513 | (-1.449, 2.475) | 0.58 | 0.573 | ||
| Route of curcumin | Chow | 0.527 | (-1.165, 2.220) | 0.69 | 0.507 | 0.1776 |
| Intravenous injection | 0.758 | (-1.443, 2.959) | 0.76 | 0.464 | ||
Coef.: coefficient; CI: confidence interval; ∗Dummy variable was applied for metaregression analysis of multicategorical variable. The former P value in metaregression analysis of multicategorical variable represents the comparison of each variable with the control variable (thoracic aorta or oral gavage). The latter P value represents a total statistical difference of assessing location area or route of curcumin. P < 0.05 was considered to be of statistical difference.