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Threshold effect analysis of WWI on depression using a two-piecewise linear regression model
| WWI | 0R (95% CI) |
|---|---|
| Fitting by the standard linear model | 1.38 (1.17, 1.63) |
| Fitting by the two-piecewise linear model | |
| Inflection point | 12.31 |
| WWI < 12.31 | 1.67 (1.33, 2.10) |
| WWI > 12.31 | 0.71 (0.41, 1.24) |
| P for log-likelihood ratio | 0.011 |
