Table 2.
Events, multimorbidity-free time, and incidence rates of psychological and cognitive multimorbidities in participants with a new-onset physical condition (n = 20,250).
| Total person-years | Physical-psychological multimorbidity (N = 3810) |
Physical-cognitive multimorbidity (N = 2618) |
Physical-psychological-cognitive multimorbidity (N = 1500) |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Events/N | Mean multimorbidity-free years | Incidence rate per 1000 person-years | Events/N | Mean multimorbidity-free time | Incidence rate per 1000 person-years | Events/N | Mean multimorbidity-free time | Incidence rate per 1000 person-years | ||
| Educational level | ||||||||||
| Primary | 39,524 | 1187/5362 | 11.18 (10.96–11.39) | 30.03 (28.38–31.77) | 812/5362 | 12.23 (12.01–12.45) | 20.54 (19.18–22.00) | 632/5362 | 12.66 (12.44–12.88) | 15.99 (14.79–17.29) |
| Secondary | 67,106 | 1542/8135 | 12.57 (12.43–12.72) | 22.98 (21.86–24.15) | 1118/8135 | 13.27 (13.13–13.41) | 16.66 (15.71–17.66) | 572/8135 | 14.42 (14.30–14.54) | 8.52 (7.85–9.26) |
| Tertiary | 61,945 | 1081/6753 | 13.60 (13.47–13.73) | 17.45 (16.44–18.52) | 688/6753 | 14.32 (14.20–14.44) | 11.11 (10.30–11.97) | 296/6753 | 15.25 (15.16–15.33) | 4.78 (4.26–5.36) |
| Total household wealth | ||||||||||
| Quartile 1 (Lowest) | 42,221 | 1132/5073 | 11.69 (11.49–11.89) | 26.81 (25.30–28.41) | 781/5073 | 12.65 (12.45–12.85) | 18.50 (17.24–19.84) | 559/5073 | 13.38 (13.19–13.57) | 13.24 (12.18–14.39) |
| Quartile 2 | 43,318 | 1040/5054 | 12.44 (12.26–12.63) | 24.01 (22.60–25.50) | 678/5054 | 13.38 (13.20–13.55) | 15.65 (14.51–16.88) | 399/5054 | 14.30 (14.15–14.46) | 9.21 (8.34–10.17) |
| Quartile 3 | 42,258 | 881/5067 | 12.97 (12.80–13.14) | 20.85 (19.52–22.27) | 637/5067 | 13.61 (13.45–13.78) | 15.07 (13.94–16.29) | 325/5067 | 14.65 (14.51–14.79) | 7.69 (6.89–8.58) |
| Quartile 4 (Highest) | 40,778 | 757/5056 | 13.50 (13.34–13.66) | 18.56 (17.29–19.93) | 522/5056 | 14.13 (13.98–14.28) | 12.80 (11.74–13.95) | 217/5056 | 15.12 (15.00–15.23) | 5.32 (4.65–6.09) |
| SES | ||||||||||
| Low | 14,212 | 450/1832 | 10.54 (10.17–10.92) | 31.66 (28.88–34.71) | 301/1832 | 11.71 (11.32–12.11) | 21.18 (18.91–23.72) | 262/1832 | 11.96 (11.57–12.34) | 18.44 (16.32–20.82) |
| Lower-middle | 67,004 | 1691/8152 | 12.11 (11.96–12.26) | 25.24 (24.07–26.46) | 1193/8152 | 12.95 (12.79–13.10) | 17.80 (16.82–18.84) | 759/8152 | 13.84 (13.70–13.98) | 11.33 (10.55–12.17) |
| Upper-middle | 65,152 | 1361/7788 | 13.06 (12.93–13.20) | 20.89 (19.81–22.02) | 900/7788 | 13.85 (13.72–13.98) | 13.81 (12.94–14.75) | 409/7788 | 14.93 (14.82–15.03) | 6.28 (5.69–6.92) |
| High | 22,207 | 308/2478 | 14.18 (13.99–14.38) | 13.87 (12.39–15.52) | 224/2478 | 14.60 (14.42–14.77) | 10.09 (8.83–11.51) | 70/2478 | 15.52 (15.40–15.63) | 3.15 (2.48–4.01) |
N, number; SES, socioeconomic status.
Incidence rate was presented per 1000 person-years; Mean multimorbidity-free years was measured using the median Irwin's restricted mean for multimorbidity-free survival time. Socioeconomic status is a summed score (ranging 0–5) of educational level (0, 1, or 2) and total household wealth quartile (0, 1, 2, or 3), categorized into four groups: low (0), lower-middle (1–2), upper-middle (3–4) and high socioeconomic status (5).