Table 3.
Results of mixed-effect models examining changes in average QOL domain scores by age group over time.
| Physical Function |
Social Function |
Role Function |
Emotional Function |
Cognitive Function |
Global QOL |
|
|---|---|---|---|---|---|---|
| (Intercept) | 89.44 (84.69–94.19)*** | 68.98 (62.47–75.48)*** | 77.00 (69.90–84.10)*** | 68.65 (63.07–74.24)*** | 82.20 (77.30–87.10)*** | 66.93 (61.98–71.88)*** |
| Time (vs. 0, baseline) | −0.17 (−0.69–0.35) | 0.56 (−0.21–1.34) | −0.46 (−1.34–0.41) | 0.46 (−0.17–1.08) | −0.30 (−0.84–0.24) | 0.46 (−0.13–1.06) |
| Age Group (vs. YA) | ||||||
| 40–49 | −3.09 (−8.68–2.50) | −0.93 (−8.60–6.74) | −5.35 (−13.71–3.00) | −0.60 (−7.20–5.99) | −0.37 (−6.15–5.42) | −2.58 (−8.41–3.26) |
| 50–64 | −6.60 (−11.62-−1.59)** | 0.42 (−6.46–7.29) | −6.62 (−14.13–0.88) | −3.04 (−8.95–2.87) | −0.74 (−5.93–4.45) | −4.65 (−9.88–0.58) |
| 65+ | −10.44 (−15.43-−5.45)*** | 6.96 (0.12–13.80)* | −4.27 (−11.73–3.19) | 4.72 (−1.16–10.60) | 2.40 (−2.76–7.56) | −4.38 (−9.58–0.82) |
| Time x Age Group | ||||||
| Time x 40–49 | −0.09 (−0.71–0.52) | −0.52 (−1.45–0.41) | 0.42 (−0.63–1.46) | −0.24 (−0.99–0.50) | −0.19 (−0.84–0.45) | −0.23 (−0.94–0.48) |
| Time x 50–64 | 0.06 (−0.49–0.61) | −0.18 (−1.01–0.64) | 0.61 (−0.32–1.53) | 0.29 (−0.37–0.95) | 0.1 (−0.47–0.67) | −0.03 (−0.66–0.59) |
| Time x 65+ | 0.14 (−0.40–0.68) | −0.27 (−1.09–0.54) | 0.78 (−0.14–1.70) | 0.19 (−0.47–0.84) | 0.23 (−0.33–0.80) | 0.12 (−0.50–0.74) |
|
| ||||||
| N (ID) | 1586 | 1586 | 1587 | 1588 | 1588 | 1589 |
| AIC | 32816.43 | 36408.23 | 34150.43 | 33139.80 | 35636.79 | 33547.91 |
| R2 (fixed) | 0.02 | 0.00 | 0.03 | 0.01 | 0.02 | 0.01 |
| R2 (total) | 0.58 | 0.42 | 0.57 | 0.58 | 0.48 | 0.47 |
Note: Each column reflects a separate mixed-effect model. YA, young adult aged 18–39; QOL, quality of life.
*
p<0.05
**
p<0.01
***
p<0.001.