Table 2. Change in the association between perceived stress and negative affect as estimated with Linear Growth Curve Modeling.
| Outcome | Negative Affect | |||
|---|---|---|---|---|
|
|
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| Fixed effect β (SE) | t | p | Random Effect: SD | |
|
|
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| Time in weeks | ||||
| Intercept | 1.24 (0.08) | 15.00 | < 0.01 | 0.53 |
| NA t-1 | 0.25 (0.03) | 8.18 | < 0.01 | 0.17 |
| Perceived stress | 0.14 (0.02) | 6.18 | < 0.01 | 0.07 |
| Time in weeks | - 0.02 (0.01) | - 1.97 | 0.05 | 0.04 |
| Time × Stress | <0.01 (0.01) | - 0.34 | 0.93 | 0.01 |
| N days practiced | ||||
| Intercept | 1.35 (0.07) | 18.54 | < 0.01 | 0.46 |
| NA t-1 | 0.24 (0.03) | 7.87 | < 0.01 | 0.17 |
| Perceived stress | 0.12 (0.02) | 7.57 | < 0.01 | 0.06 |
| Weeks practice | -0.03 (0.01) | - 2.61 | < 0.01 | 0.04 |
| Weeks practice × Stress | <-0.01 (0.01) | - 0.23 | 0.82 | 0.02 |
Note: Time in weeks = days since the start of MBSR/7, weeks practice = number of days of mindfulness practice so far/7, Stress = perceived stress. The presented multilevel models included 71 individuals and 2111 observations.