Table 3.
Mediation by depression or anxiety of the association between sleep difficulties in 2011 and incident pain in 2013
| Odds ratio (bootstrapped 95% CI) | Percentage of sleep association mediateda | |||
|---|---|---|---|---|
| Total sleep association | Direct sleep association | Indirect sleep association through mediator | ||
| Mediator: Depression | ||||
| >30 minutes to fall asleep | ||||
| Unadjustedb | 1.35 (1.12, 1.62) | 1.34 (1.11, 1.60) | 1.01 (1.00, 1.04) | 0% |
| Adjustedc | 1.25 (1.03, 1.51) | 1.24 (1.02, 1.51) | 1.00 (0.99, 1.51) | 0% |
| Difficulty falling back to sleep | ||||
| Unadjustedb | 1.33 (1.10, 1.60) | 1.33 (1.10, 1.60) | 1.01 (1.00, 1.03) | 0% |
| Adjustedc | 1.28 (1.04, 1.55) | 1.28 (1.04, 1.55) | 1.00 (1.00, 1.02) | 0% |
| Mediator: Anxiety | ||||
| >30 minutes to fall asleep | ||||
| Unadjustedb | 1.36 (1.12, 1.64) | 1.28 (1.05, 1.54) | 1.06 (1.03, 1.11) | 19% |
| Adjustedd | 1.26 (1.03, 1.52) | 1.22 (0.99, 1.48) | 1.04 (1.01, 1.08) | 17% |
| Difficulty falling back to sleep | ||||
| Unadjustedb | 1.36 (1.13, 1.64) | 1.28 (1.05, 1.56) | 1.06 (1.03, 1.12) | 19% |
| Adjustedd | 1.30 (1.07, 1.58) | 1.25 (1.03, 1.51) | 1.04 (1.01, 1.08) | 15% |
aCalculated as the natural logarithm of the indirect effect divided by the natural logarithm of the total effect.
bIncludes adjustment for survey weights.
cAdjusted for the following baseline variables: age, race, education, sex, use of mobility device, marital status, cardiovascular disease, diabetes, and survey weights.
dAdjusted for the following baseline variables: age, race, education, sex, use of mobility device, marital status, cardiovascular disease, and survey weights.