About 5% of the women with the highest peak workload—those who were able to bike the hardest over those 6 minutes—developed dementia, compared to 25% of those with medium fitness and 45% who weren't fit enough to finish the test, the study found.
研究发现,在峰值工作负荷最高的女性中,也就是能在这6分钟内以最大强度骑车的女性,约有5%患上了痴呆症;相比之下,中等健康水平的女性中这一比例为25%,而身体状况差到无法完成测试的女性中,这一比例为45%。
两个破折号之间的 "those who were able to bike the hardest over those 6 minutes" 与前面的 "the women with the highest peak workload" 指同一群人,是同位解释,具体说明“峰值工作负荷最高的女性”是哪些人。去掉这部分后,主干 "About 5% of the women ... developed dementia" 仍然成立。