Moreover, if ED was merely an early marker, it would be
more likely to occur near the time of onset of cardiovascular
events. In fact, the mean length of follow-up in primary
studies ranged from 4 to 16 years. Such a large interval
between the 2 diseases further supports the hypothesis that
ED is an independent risk factor.
Back：此外，如果ED(阳痿)仅是早期标志物，它很可能在心血管事件发作时发生。 实际上，初级研究的平均随访时间为4至16年。 两种疾病之间如此大的间隔进一步支持了以下假设：ED是独立的危险因素。<湘雅meta范文>