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Slope difference test, comparing slopes depicted in Figure 3.
| Pair of slopes | t-value for slope difference | p-value for slope difference |
|---|---|---|
| 1 = high LTPA, high PNS | ||
| 2 = high LTPA, low PNS | ||
| 3 = low LTPA, high PNS | ||
| 4 = low LTPA, low PNS | ||
| (1) and (2) | 3.30 | 0.001 |
| (1) and (3) | –0.71 | 0.481 |
| (1) and (4) | –0.98 | 0.326 |
| (2) and (3) | –3.07 | 0.002 |
| (2) and (4) | –3.70 | 0.000 |
| (3) and (4) | –0.09 | 0.928 |
