Table 1. Sociodemographic characteristics of the study population (n = 1039): Comparison of multimorbid patients with and without chronic pain in a population of inpatients in a department of internal medicine in a tertiary care hospital.
| Patients | Multimorbid patients with chronic pain (n = 393) | Multimorbid patients without chronic pain (n = 646) | p-value |
| Gender, n (%) | p = 0.029 | ||
| Male | 202 (51.4) | 377 (58.4) | |
| Female | 191 (48.6) | 269 (41.6) | |
| Mean age, in years (SDa) | 65.7 (15.9) | 66.7 (15.5) | p = 0.318 |
| Hospitalization | p = 0.710 | ||
| Single hospitalization in 2011 (%) | 358 (91.1) | 584 (90.4) | |
| Multiple hospitalization in 2011 (%) | 35 (8.9) | 62 (9.6) | |
| Cases | Multimorbid patients with chronic pain (n = 433) | Multimorbid patients without chronic pain (n = 706) | p-value |
| Mean number of chronic conditions (SD) | 6.6 (2.9) | 5.01 (2.4) | p < 0.00005 |
| Mean days of stay in hospital (SD) | 15.7 (19.1) | 12.5 (11.6) | p < 0.0007 |
a SD = Standard deviation.