Table 2. Ordinal Logistic Regression Models and Interaction Effects for the Association Between Neuroticism, Adverse Life Events, and Health Anxiety.
| Independent variable | OR [95% CI] | Z | p | N |
|---|---|---|---|---|
| Neuroticism, cru | 1.09 [1.09, 1.10] | 31.22 | < 0.01 | 7362 |
| Neuroticism, adja | 1.08 [1.07, 1.09] | 24.24 | < 0.01 | 6169 |
| Illness/death related life events, cru | 1.05 [1.03, 1.07] | 6.59 | < 0.01 | 7348 |
| Illness/death related life events, adjb | 1.05 [1.03, 1.07] | 5.74 | < 0.01 | 6169 |
| Other adverse life events, cru | 1.12 [1.10, 1.15] | 11.02 | < 0.01 | 7391 |
| Other adverse life events, adjc | 1.05 [1.03, 1.08] | 4.48 | < 0.01 | 6169 |
| Illness/death*neuroticism, cru | 1.002 [1.000, 1.005] | 2.60 | < 0.01 | 7261 |
| Illness/death*neuroticism, adjd | 1.002 [1.000, 1.004] | 1.96 | 0.05 | 6169 |
| Other adverse*neuroticism, cru | 1.000 [0.997, 1.002] | 0.08 | 0.93 | 7303 |
| Other adverse*neuroticism, adje,f | 0.999 [0.996, 1.002] | -0.25 | 0.82 | 6169 |
Note. Cru = crude; Adj = adjusted; OR = odds ratio. OR values should be interpreted as the cumulative odds of scoring higher on the WI6-R for each additional point on neuroticism (range: 0-48), Other adverse life events (range: 0-104), Illness/death related life events (range: 0-52). BRANT tests for proportional odds were non-significant in all cases except for the crude model for the interaction between neuroticism and illness/death related life events, where a BRANT test showed a p = .023 for the overall model. Nevertheless, variable level tests were all p > .05. Consequently, we chose to regard the assumption of proportional odds as sufficiently fulfilled.
aillness/death related life events, other adverse life events, physical activity, sleep problems, self-reported social status. bneuroticism, other adverse life events, physical activity, sleep problems, self-reported social status. cillness/death related life events, neuroticism, physical activity, sleep problems, self-reported social status. dother adverse life events, physical activity, sleep problems, self-reported social status. eillness/death related life events, physical activity, sleep problems, self-reported social status. fInteraction effects in the last four rows are based on ordinal logistic regression models with interaction terms included. To see the estimated parameters of all variables included in these models, see Appendix C.