Prospective assessment of subjective sleep benefit in Parkinson's disease.

BMC Neurol · 2015 · PMC4300997 · PMID 25591551

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showed a trendno p-value reported

When comparing patients with and without SB based on the symptom diary, we found that patients with SB had used PD medication during a longer period of time and showed a trend towards longer disease duration (Table 2 ).

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