Table 8.
Linear mixed effects model parameter estimates for peak pupil dilation among participants with posttraumatic stress disorder (PTSD) and participants without PTSDa.
| Parameter | Estimate (SE; 95% CI) | t test (df) | P value | Wald Z | P value | |||||||||||
| Fixed effects | —b | — | ||||||||||||||
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Intercept | 0.07 (0.02; 0.03 to 0.11)c | 3.41 (43.83) | .001 |
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Treatment group | |||||||||||||||
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Participants with PTSD | Reference | Reference | Reference |
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Participants without PTSD | –0.07 (0.03; 0.12 to –0.01) | –2.52 (34.65) | .02 |
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Time period | |||||||||||||||
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BLd | Reference | Reference | Reference |
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Postintervention | –0.06 (0.01; 0.08 to –0.04) | –5.58 (53.72) | <.001 |
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Protocol condition | |||||||||||||||
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BL | Reference | Reference | Reference |
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ESTe 1 | 0.13 (0.01; 0.11 to 0.15) | 11.37 (162.12) | <.001 |
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EST 2 | 0.08 (0.01; 0.05 to 0.10) | 6.80 (144.07) | <.001 |
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GMf 1 | −0.04 (0.01; 0.06 to –0.02) | –3.58 (145.74) | <.001 |
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GM 2 | –0.10 (0.01; 0.12 to –0.08) | –9.13 (153.38) | <.001 |
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| Random effects (intercept) | 0.005 (0.00; 0.003 to 0.009) | — | — | 3.57 | <.001 | |||||||||||
| Repeated measures | — | — |
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ARg 1 diagonal | 0.004 (0.00; 0.003 to 0.005) |
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10.25 | <.001 | ||||||||||
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AR 1 rho | –0.21 (0.08; 0.36 to –0.04) |
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–2.50 | .01 | ||||||||||
aAkaike Information Criterion –577.92.
bNot available (no data).
cItalicized values indicate significant findings (P<.01; 2-tailed).
dBL: baseline rest phase.
eEST: emotional image stress task phase.
fGM: guided meditation phase.
gAR: autoregressive covariance structure.