Table 1.
Characteristics of individuals in the incidence and progression cohorts of the OAI (n = 4,674)*
| Characteristic | Result |
|---|---|
| Age, mean ± SD (range) years | 61.3 ± 9.2 (45–79) |
| Age group, years | |
| 45–54 | 1,346 (29) |
| 55–64 | 1,525 (33) |
| 65–74 | 1,370 (29) |
| ≥75 | 433 (9) |
| Women | 2,729 (58) |
| WOMAC pain (0–20), median (IQR) | |
| Baseline | 2 (0–6) |
| Maximum | 5 (3–9) |
| BMI, mean ± SD kg/m2 | 28.7 ± 4.8 |
| BMI ≥30 kg/m2, no./total no. (%) | 1,765/4,670 (38) |
| OAI cohort | |
| Incidence | 3,284 (70) |
| Progression | 1,390 (30) |
| Seeing HCP for arthritis | 566 (12) |
*
Values are the number (percentage) unless indicated otherwise. OAI = Osteoarthritis Initiative; WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index; IQR = interquartile range (first and third quartile); BMI = body mass index; HCP = health care professional.
†
Recorded at any visit.