Table 5.
Multiple linear regression on the MDASI sum score with age, sex, education, comorbidity and depression as explanatory variables (N = 2021)
| MDASI sum scorea | |||
|---|---|---|---|
| Adjusted R2 = 0.45 | |||
| B | 95% CI | p | |
| Age groups | 0.446 | ||
| 18–29 years | 0.397 | −2.761, 3.555 | 0.805 |
| 30–39 years | −0.449 | −2.985, 2.087 | 0.728 |
| 40–49 years | − 1.214 | −3.318, 0.890 | 0.258 |
| 50–59 years | 0.735 | −1.244, 2.715 | 0.466 |
| 60–69 years | 0.292 | −1.583, 2.167 | 0.760 |
| 70–80 years (ref) | – | ||
| Sex | 0.109 | ||
| Women | 0.99 | −0.222, 2.202 | 0.109 |
| Men (ref) | – | ||
| Education | 0.002 | ||
| Elementary and/or primary school | 2.591 | 0.759, 4.423 | 0.006 |
| Second level (high school) | 2.029 | 0.695, 3.363 | 0.003 |
| Third level (university or university college) (ref) | – | ||
| Comorbidities | 0.000 | ||
| 0 (ref) | – | ||
| 1–2 | 3.452 | 2.116, 4.789 | 0.000 |
| ≥3 | 10.693 | 8.627, 12.760 | 0.000 |
| Depression | 0.000 | ||
| PHQ score | 4.685 | 4.412, 4.958 | 0.000 |
aDemographic and disease-related variables that were significantly correlated with MDASI sum score in the univariable analyses were entered as covariates