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Sleep plays a critical role in maintaining human health. This study aimed to explore the association between sleep status and thyroid nodules. A total of 2414 individuals aged 18 or older with euthyroidism were enrolled in this community-based survey. Sleep status was self-reported. Thyroid ultrasonography was performed to measure nodules. Multiple logistic analyses were applied to adjust for confounding factors. The percentages of thyroid nodules among individuals who slept &lt;5 hours, 5–8 hours, and &gt;8 hours per night were 57.79% (115/199), 44.19% (833/1885) and 42.73% (141/330), respectively (p = 0.001). Individuals who slept &lt;5 hours per night had a significantly higher percentage of thyroid nodules than those who slept 5–8 hours per night (57.79% vs. 44.19%, p = 0.001) or &gt;8 hours per night (57.79% vs. 42.73%, P &lt; 0.001). However, no similar result was shown between individuals who slept &gt;8 hours and 5–8 hours per night (42.73% vs. 44.19%, p = 0.621). Multiple logistic analysis showed that a sleep duration of &lt;5 hours per night was significantly associated with thyroid nodules (odds ratio (OR) 1.643, 95% confidence interval (CI) 1.084–2.490, p = 0.019) when compared to a sleep duration of &gt;8 hours per night. However, a sleep duration of &lt;5 hours per night was not associated with thyroid nodules compared to a sleep duration of 5–8 hours (OR 1.294, 95% CI 0.918–1.824, p = 0.141). Similarly, no significant differences were seen among sleep duration per day, time of falling asleep, habit of daytime napping or thyroid nodules in multiple logistic analyses (all p &gt; 0.05). Short nighttime sleep duration was associated with thyroid nodules in our community-based population. Screening for thyroid nodules among these individuals is recommended.

Short night-time sleep duration is associated with thyroid nodules: A community-based survey from Guangzhou, China