Table 3.
Year 2020 (during the first peak of the COVID-19) versus year 2018 and other associations with somatic symptom severity (n = 2049).
| r | b | SE | β | t | p | 95% CI | |
|---|---|---|---|---|---|---|---|
| Constant | 1.901 | .179 | 11.13 | <.0001 | 1.565 to 2.202 | ||
| Demographics | |||||||
| Gender | .26‡ | .165 | .037 | .069 | 4.48 | <.0001 | .095 to .242 |
| Age | −.02 | .000 | .001 | −.004 | −.27 | .79 | −.002 to .001 |
| Education⁎ | −.25‡ | −.081 | .034 | −.040 | −2.58 | .01 | −.167 to .011 |
| Number of (comorbid) diseases | .43‡ | .206 | .013 | .243 | 15.12 | <.0001 | .177 to .236 |
| Group† | .58‡ | .612 | .154 | .291 | 4.04 | <.0001 | .317 to .999 |
| Year | −.15‡ | −.354 | .181 | −.160 | −2.06 | .04 | −.772 to .079 |
| Psychological flexibility | −.51‡ | −.008 | .001 | −.395 | −11.37 | <.0001 | −.010 to −.006 |
| Year × Group | .41‡ | −.087 | .070 | −.037 | −1.24 | .22 | −.246 to .029 |
| Year × Psychological flexibility | −.31‡ | .001 | .001 | .076 | .94 | .35 | −.001 to .002 |
| Group × Psychological flexibility | .50‡ | .001 | .001 | .143 | 2.19 | .03 | .000 to .003 |
Pearson correlations (r) and results of the linear regression analysis with bootstrapping examining the association of somatic symptom severity (SF-36) with gender (0 = men, 1 = women), age, education level, number of (comorbid) diseases, group, year (0 = 2018, 1 = 2020), psychological flexibility and two-way interactions.
b, unstandardized regression coefficient; SE, Standard Error; β, standardized beta; t, t-test statistic; CI, confidence interval of unstandardized regression coefficient.
Education level: 0 = low: lower general secondary education or lower; 1 = high: higher general secondary education or higher.
Group: 0 = non-CSS; 1 = CSS: people with a central sensitivity syndrome.
Pearson correlation with somatic symptom severity was significant at the 0.01 level (2-tailed).