a trend toward significancep = 0.052
The fixed-effects test for the subgroup differences suggests a trend toward significance (statistic = 4.00, df = 1, p = 0.052).
The fixed-effects test for the subgroup differences suggests a trend toward significance (statistic = 4.00, df = 1, p = 0.052).
The coefficients of spring and winter are highly significant, indicating that vitamin D levels for athletes measured in spring and winter tend to be significantly lower compared to the ones in autumn.