Table 2
Model estimated between-neighbourhood variance from null and adjusted multilevel multinomial models of sleep duration*
| Very short sleep (<5 h) | Short sleep (5–6.9 h) | Long sleep (≥9 h) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Percentage of remaining  explained by model | ICC (%) | Decrease in ICC from null model (%) |  | Percentage of remaining  explained by model | ICC (%) | Decrease in ICC from null model (%) |  | Percentage of remaining  explained by model | ICC (%) | Decrease in ICC from null model (%) | |
| Null | 0.98 | – | 23.0 | – | 0.241 | – | 6.8 | – | 1.332 | – | 28.8 | – |
| Model 1: demographics | 0.785 | 19.9 | 19.3 | 3.7 | 0.196 | 18.7 | 5.6 | 1.2 | 1.257 | 5.6 | 27.6 | 1.2 |
| Model 2: model 1+SES | 0.674 | 14.1 | 17.0 | 6.0 | 0.182 | 7.1 | 5.2 | 0.4 | 1.246 | 0.9 | 27.5 | 0.2 |
| Model 3: model 2+lifestyle | 0.712 | −5.6 | 17.8 | 5.2 | 0.171 | 6.0 | 4.9 | 0.3 | 1.193 | 4.3 | 26.6 | 0.9 |
| Model 4: model 3+nSES | 0.081 | 88.6 | 2.4 | 20.6 | 0.012 | 93.0 | 0.4 | 4.6 | 0.015 | 98.7 | 0.5 | 26.2 |
| Model 5: model 4+health | 0.08 | 1.2 | 2.4 | 20.6 | 0.012 | 0.0 | 0.4 | 0.0 | 0.010 | 33.3 | 0.3 | 0.2 |
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*Reference is normative sleep (7–8.9 h).
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ICC, intraclass correlation coefficient; nSES, neighbourhood socioeconomic status.