Table 1.
Characteristics at baseline for all study participants (n=3939) and within trajectory groups.
| Subject characteristic at baseline | All Study Participants (n=3939) |
No depressive symptoms (n=647) |
Mild depressive symptoms (n=1172) |
Mild/Moderate depressive symptoms (n=1074) |
Worsening moderate depressive symptoms (n=743) |
Worsening severe depressive symptoms (n=303) |
|---|---|---|---|---|---|---|
| Age [Mean (sd; min-max)] |
61.4 (9.2; 45–79) |
60.5 (8.7; 45–79) |
61.0 (8.9;45–79) |
62.0 (9.2; 45–79) |
62.2 (9.5; 45–79) |
60.5 (9.7; 45–79) |
| Women [%] | 58 | 50 | 57 | 57 | 62 | 64 |
| White [%] | 83 | 87 | 84 | 81 | 79 | 81 |
| College graduate [%] | 63 | 74 | 68 | 61 | 55 | 52 |
| Depressive symptoms (CES-D) [Mean (sd; min-max)] |
4.8 (4.1; 0–15) |
1.0 (1.4, 0–7) |
2.9 (2.5, 0–14) |
5.5 (3.4, 0–15) |
7.8 (3.9, 0–15) |
9.7 (3.9, 0–15) |
| At least 1 comorbidity [%] | 23 | 15 | 20 | 24 | 27 | 30 |
| Mean BMI [kg/m2] [Mean (sd; min-max)] |
28.4 (4.7; 17.6–48.7) |
27.5 (4.4; 17.7–42.0) |
28.2 (4.6; 18.4–47.4) |
28.6 (4.8; 17.8–46.8) |
28.7 (4.8; 18.1–48.7) |
29.6 (4.9; 17.6–44.3) |
| Healthy weight (< 25) [%] | 25 | 30 | 26 | 24 | 23 | 16 |
| Overweight (25 to 30) [%] | 40 | 43 | 41 | 38 | 40 | 38 |
| Obese (≥ 30) [%] | 35 | 27 | 34 | 38 | 38 | 46 |
| ROA [%] | 56 | 49 | 54 | 60 | 58 | 58 |
| Knee pain in the last 30 days [0–10] [Mean (sd; min-max)] |
3.1 (2.6; 0–10) |
2.4 (2.4, 0–10) |
2.9 (2.6, 0–10) |
3.2 (2.6; 0–10) |
3.6 (2.7; 0–10) |
4.1 (2.9; 0–10) |