| gene | 0.41 |
| fall asleep | 0.59 |
| affect millions of peop… | 0.44 |
| last over a couple nigh… | 0.42 |
| be a symptom of depress… | 0.41 |
| affect people | 0.40 |
| increase with age | 0.39 |
| last for week | 0.38 |
| affect mood | 0.38 |
| last for day | 0.36 |
| increase the risk | 0.35 |
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| headache | 0.29 |
| significant distress | 0.26 |
| difficulty | 0.40 |
| having difficulty | 0.34 |
| the inability | 0.33 |
| positive response | 0.31 |
| significant impact | 0.39 |
| anxiety | 0.55 |
| irritability | 0.52 |
| depression | 0.48 |
| fatigue | 0.43 |
| high blood pressure | 0.31 |
| diabetes | 0.31 |
| heart disease | 0.31 |
| lethargy | 0.31 |
| sleep deprivation | 0.30 |
| memory problems | 0.28 |
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| problem | 0.56 |
| a sleep disorder | 0.52 |
| condition | 0.50 |
| common problem | 0.47 |
| common sleep disorder | 0.43 |
| the most common sleep d… | 0.42 |
| complex condition | 0.38 |
| major problem | 0.35 |
| constant problem | 0.33 |
| bigger problem | 0.23 |
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| caused | 0.63 |
| treated | 0.58 |
| caused by stress | 0.57 |
| characterized by diffic… | 0.55 |
| associated with depress… | 0.54 |
| caused by depression | 0.52 |
| caused by anxiety | 0.50 |
| common in woman | 0.48 |
| followed by daytime sle… | 0.47 |
| followed by depressed m… | 0.45 |
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| digestive issues | 0.19 |