Mean Participant Characteristics by Treatment.

Note: the last column reports the non-parametric Wilcoxon rank-sum test statistic (also known as Mann-Whitney test), under the null hypothesis that the two independent samples (NWT and WT) are from populations with the same distribution. * = significant at 10%; ** = significant at 5%; *** = significant at 1%.备注：最后一列报告的是非参数威尔科克森秩和检验（Wilcoxon rank-sum test，又称曼-惠特尼检验（Mann-Whitney test））的统计量，该检验的原假设为两个独立样本（NWT与WT）取自分布一致的总体。 * 代表在10%显著性水平下显著； ** 代表在5%显著性水平下显著； *** 代表在1%显著性水平下显著。