TABLE 3.
Fully adjusted associations between plasma fatty acids and actigraphy-assessed weekday sleep characteristics in a sample of 405 Mexican youth1
| Weekend duration, min | P trend2 | Weekday midpoint, h | P trend2 | Fragmentation, adjusted difference | P trend2 | |
|---|---|---|---|---|---|---|
| DHA, % of total FA | 0.005 | 0.07 | 0.09 | |||
| Q1 (median = 0.81) | −32 (−57, −7)3,* | 0.14 (−0.29, 0.58)3 | 1.0 (−0.2, 2.3)3 | |||
| Q2 (median = 1.05) | −21 (−44, 1) | 0.75 (0.36, 1.14)* | 0.8 (−0.3, 1.9) | |||
| Q3 (median = 1.25) | −4 (−26, 17) | 0.04 (−0.33, 0.42) | 0.5 (−0.6, 1.6) | |||
| Q4 (median = 1.61) | Reference | Reference | Reference | |||
| AA, % of total FA | 0.72 | 0.18 | 0.41 | |||
| Q1 (median = 4.6) | 2 (−22, 27) | 0.36 (−0.07, 0.78) | −0.3 (−1.5, 0.9) | |||
| Q2 (median = 5.8) | 9 (−14, 31) | 0.01 (−0.38, 0.40) | −0.3 (−1.4, 0.8) | |||
| Q3 (median = 6.7) | 1 (−21, 22) | 0.13 (−0.24, 0.50) | 0.4 (−0.7, 1.4) | |||
| Q4 (median = 7.8) | Reference | Reference | Reference | |||
| DHA:AA ratio | 0.24 | 0.28 | 0.32 | |||
| Q1 (median = 0.14) | −10 (−31, 12) | 0.22 (−0.16, 0.60) | 0.6 (−0.4, 1.7) | |||
| Q2 (median = 0.17) | −11 (−32, 10) | 0.24 (−0.14, 0.61) | −0.4 (−1.4, 0.6) | |||
| Q3 (median = 0.20) | 1 (−20, 22) | 0.23 (−0.16, 0.60) | −0.1 (−1.1, 0.9) | |||
| Q4 (median = 0.25) | Reference | Reference | Reference |
AA, arachidonic acid; FA, fatty acid; Q, quartile. *Statistically significantly different from the reference at P < 0.05.
Values of P for trends are from Wald tests in adjusted linear regression models with a continuous variable representing ordinal categories of plasma fatty acid quartiles.
Values are adjusted differences (95% CI); from linear regression models with sleep characteristic as the dependent variable, indicator variables for quartiles of plasma DHA, plasma AA, caffeine intake, a continuous variable for total energy intake; as well as sex, age, and indicator variables for maternal education and BMI-for-age z-scores.