Table 3.
Preliminary multivariate mixed-effects model for abdominal pain severity with age as predictor and significant covariates simultaneously entered (n = 131; observations = 4890)
| Beta Coefficient a | Standard Error/Standard Deviation | P-value | |
|---|---|---|---|
| Fixed effects | |||
| β1 Intercept | 0.18 | 0.03 | < 0.001 |
| β2 Age (−47.6) years | −0.01 | 0.003 | < 0.001 |
| β3 Perceived Stress | −0.01 | 0.007 | 0.040 |
| β4 Urinary Estrone (Log 10) | −0.03 | 0.02 | 0.090 |
| β5 Urinary Testosterone (Log 10) | −0.02 | 0.01 | 0.080 |
| β6 Tension | 0.002 | 0.01 | 0.830 |
| β7 Anxiety | 0.06 | 0.01 | < 0.001 |
| Random effects | |||
| b1 Intercept σ1 | 0.26 | ||
| b2 Age (−47.6) years σ2 | 0.01 | ||
| b3 Residual σ3 | 0.35 | ||
a The beta coefficient is a measure of the change in abdominal pain severity for every one unit of change in each respective predictor variable