Pada lansia proses penuaan yang dialami menyebabkan penurunan siklus tidur NREM 3 dan 4. Akibat penurunan tersebut mempengaruhi kualitas tidur lansia. Kualitas tidur menunjukkan kepuasan seseorang terhadap tidurnya, dimana orang tersebut tidak menunjukkan tanda-tanda kekurangan tidur.
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