Another 15 % reported undiagnosed symptomatic lower leg swelling.是什么意思？

Another 15 % reported undiagnosed symptomatic lower leg swelling.

还有15%的被调查者报告有未知原因的症状性下肢肿胀.

another

adj. 又一个，再一个，另一的，其他一种；pron. 另一个，别个，再一个；

例句
He was accusing my mum of having an affair with another man...
他指责我妈妈与另一个男人有染。

reported

adj. 据报告的，据报导的，据传闻的；

例句
A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。

undiagnosed

adj. 未确诊的，尚未找出原因的；

例句
...an undiagnosed medical condition that laid him low for months.
使他病倒了好几个月的未确诊疾病

symptomatic

--

例句
Antiplatelet therapy is recommended for symptomatic patients.
推荐抗血小板治疗症状性患者.

lower

adj. 下方的，在底部的，较低级的；v. 降低，减少，缩小；

例句
...a speech in which he affirmed a commitment to lower taxes...
他作出减税承诺的演讲

leg

n. 腿，支柱，支架，裤腿，一段赛程；vi. <口>走，跑；

例句
My leg still aches when I sit down...
坐下时我的腿还会痛。

swelling

n. 肿胀，膨胀，增大；v. 肿胀(swell的ing形式)，增强，骄傲，自满；

例句
The proceeds from the lottery go towards sports and recreation, as well as swelling the coffers of the government...
彩票收入用于发展体育和娱乐产业，同时还用来充实国库。