Here is another publication that is pending, this time a study of the relationship between suicide and RLS. The results summary so far says
192 RLS and 158 control participants were comparable for age, sex, race, and other potential demographic confounders. In general, RLS was moderate-to-severe (mean IRLSS 26.4±7.5). Significantly more RLS than control participants had lifetime suicidal ideation or behavior (27.1% vs. 7.0%; p<0.00001) or lifetime depression history (65.6%% vs. 22.8%; p<0.00001). The odds of having a lifetime suicidal ideation or behavior was higher in those with RLS (2.80 [1.29,6.11]), even after accounting for depression and other confounders. In RLS, the odds of lifetime suicidal ideation or behavior was increased if there was lifetime depression (7.37 [2.65,20.47]) or if RLS in the past was severe or very severe (2.36 [1.03,5.40]).