Prediction of half-marathon performance of male recreational marathon runners using nomogram.

In the multivariate ternary logistic regression, we found that mean training pace (AOR = 0.91, 95% CI: 0.80 to 1.04, p = 0.007) and PSQI (AOR = 2.27, 95% CI: 1.27 to 4.06, p = 0.005) were independent predictive factors for half-marathon performance, while monthly running distance shows marginal significance (AOR = 0.997, 95% CI: 0.99 to 1.00, p = 0.055) (Supplementary Table 1 ).

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In the linear regression analysis, we found that sleep quality ( r = 0.12, p = 0.079) was marginally significant correlated with half-marathon performance.

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