Table 3. Association between combination of somatic and mental conditions and ADL–IADL index.
| Multimorbidity combination groups | Unadjusted eβ (95% CI) | p value | Adjusted* eβ (95% CI) | p value |
| Total population (n=6728) | ||||
| No somatic and mental conditions (n=940) | Reference | Reference | ||
| Only 1 somatic condition (n=1103) | 1.27 (0.96-1.67) | 0.089 | 1.24 (0.97-1.60) | 0.091 |
| Somatic conditions multimorbidity (n=1687) | 1.78 (1.39-2.27) | <0.001 | 1.59 (1.28-1.97) | <0.001 |
| Only 1 mental condition (n=413) | 2.54 (1.92-3.34) | <0.001 | 1.88 (1.46-2.41) | <0.001 |
| Mental conditions multimorbidity (n=84) | 4.05 (2.75-5.96) | <0.001 | 2.09 (1.43-3.05) | <0.001 |
| Somatic-mental multimorbidity (n=2501) | 4.49 (3.60-5.59) | <0.001 | 2.61 (2.12-3.22) | <0.001 |
| Age 60-69 y (n=4495) | ||||
| No somatic and mental conditions (n=678) | Reference | Reference | ||
| Only 1 somatic condition (n=783) | 1.51 (1.07-2.11) | 0.017 | 1.35 (0.96-1.88) | 0.081 |
| Somatic conditions multimorbidity (n=1152) | 2.01 (1.48-2.72) | <0.001 | 1.75 (1.33-2.32) | <0.001 |
| Only 1 mental condition (n=236) | 2.70 (1.85-3.95) | <0.001 | 2.20 (1.52-3.18) | <0.001 |
| Mental conditions multimorbidity (n=46) | 4.09 (2.39-7.01) | <0.001 | 2.35 (1.31-4.22) | 0.004 |
| Somatic-mental multimorbidity (n=1600) | 5.14 (3.91-6.76) | <0.001 | 3.05 (2.29-4.07) | <0.001 |
| Age 70+ y (n=2233) | ||||
| No somatic and mental conditions (n=262) | Reference | Reference | ||
| Only 1 somatic condition (n=320) | 1.03 (0.67-1.58) | 0.896 | 1.05 (0.71-1.54) | 0.811 |
| Somatic conditions multimorbidity (n=535) | 1.44 (0.98-2.12) | 0.064 | 1.36 (0.99-1.86) | 0.060 |
| Only 1 mental condition (n=177) | 1.91 (1.27-2.89) | 0.002 | 1.61 (1.12-2.32) | 0.010 |
| Mental conditions multimorbidity (n=38) | 3.16 (1.92-5.19) | <0.001 | 1.94 (1.23- 3.05) | 0.004 |
| Somatic-mental multimorbidity (n=901) | 3.44 (2.44-4.86) | <0.001 | 2.10 (1.55-2.85) | <0.001 |
| Male (n=3383) | ||||
| No somatic and mental conditions (n=590) | Reference | Reference | ||
| Only 1 somatic condition (n=665) | 1.64 (1.16-2.31) | 0.005 | 1.42 (1.00-2.02) | 0.047 |
| Somatic conditions multimorbidity (n=944) | 1.99 (1.44-2.75) | <0.001 | 1.63 (1.20-2.20) | 0.002 |
| Only 1 mental condition (n=200) | 3.03 (2.10-4.36) | <0.001 | 2.28 (1.56-3.32) | <0.001 |
| Mental conditions multimorbidity (n=25) | 3.53 (1.89-6.60) | <0.001 | 1.94 (1.09-3.43) | 0.024 |
| Somatic-mental multimorbidity (n=959) | 5.59 (4.25-7.36) | <0.001 | 2.84 (2.15-3.75) | <0.001 |
| Female (n=3345) | ||||
| No somatic and mental conditions (n=350) | Reference | Reference | ||
| Only 1 somatic condition (n=438) | 0.98 (0.67-1.43) | 0.901 | 1.04 (0.75-1.45) | 0.792 |
| Somatic conditions multimorbidity (n=743) | 1.58 (1.11-2.25) | 0.012 | 1.53 (1.14-2.06) | 0.005 |
| Only 1 mental condition (n=213) | 1.99 (1.33-2.99) | 0.001 | 1.63 (1.17-2.27) | 0.004 |
| Mental conditions multimorbidity (n=59) | 3.21 (1.98-5.22) | <0.001 | 1.99 (1.28-3.11) | 0.002 |
| Somatic-mental multimorbidity (n=1542) | 3.34 (2.40-4.65) | <0.001 | 2.36 (1.77-3.16) | <0.001 |
| Urban residence (n=2472) | ||||
| No somatic and mental conditions (n=365) | Reference | Reference | ||
| Only 1 somatic condition (n=459) | 0.92 (0.57-1.49) | 0.725 | 0.94 (0.62-1.44) | 0.781 |
| Somatic conditions multimorbidity (n=787) | 1.59 (1.03-2.44) | 0.036 | 1.33 (0.93-1.91) | 0.120 |
| Only 1 mental condition (n=133) | 3.32 (2.06-5.35) | 0.001 | 2.20 (1.44-3.36) | <0.001 |
| Mental conditions multimorbidity (n=14) | 4.56 (2.02-10.28) | <0.001 | 3.22 (1.07-9.69) | 0.038 |
| Somatic-mental multimorbidity (n=714) | 4.57 (3.04-6.88) | <0.001 | 2.36 (1.61-3.47) | <0.001 |
| Rural residence (n=4256) | ||||
| No somatic and mental conditions (n=575) | Reference | Reference | ||
| Only 1 somatic condition (n=644) | 1.53 (1.10-2.11) | 0.011 | 1.48 (1.11-1.99) | 0.009 |
| Somatic conditions multimorbidity (n=900) | 2.08 (1.57-2.74) | <0.001 | 1.85 (1.46-2.35) | <0.001 |
| Only 1 mental condition (n=280) | 2.09 (1.50-2.93) | <0.001 | 1.68 (1.28-2.21) | <0.001 |
| Mental conditions multimorbidity (n=70) | 3.64 (2.38-5.58) | <0.001 | 2.07 (1.43-2.98) | <0.001 |
| Somatic-mental multimorbidity (n=1787) | 4.27 (3.32-5.48) | <0.001 | 2.78 (2.23-3.47) | <0.001 |
*Models adjusted for complex survey design; adjusted for age-sex-education-marital status-smoking status-drinking status-current residence-geographical region-and baseline ADL–IADL index. ADL = activities of daily living; IADL = instrumental activities of daily living; CI = confidence interval.