Table 1.
Summary of statistics of risk factors employed in the study.
| Risk Factor Category | Risk Factor | Onset Study Group | Deterioration Study Group | |
|---|---|---|---|---|
| Demographic Information | Age | Range | 45–79 | 45–79 |
| Mean | 59.39 | 62.26 | ||
| Standard Dev. | 8.88 | 8.64 | ||
| Weight | Range | 42.6–132.8 kg | 48.3–135.5 kg | |
| Mean | 79.59 kg | 85.14 kg | ||
| Standard Dev. | 15.89 kg | 15.54 kg | ||
| Sex | Male | 42.93% | 40.12% | |
| Female | 57.07% | 59.88% | ||
| Race | White | 86.47% | 74.57% | |
| Black | 11.38% | 23.18% | ||
| Asian | 1.36% | 0.71% | ||
| Other | 0.79% | 1.54% | ||
| Mechanical Factors | History of Injury | Yes | 19.22% | 32.01% |
| No | 79.68% | 67.99% | ||
| History of Surgery | Yes | 4.67% | 18.35% | |
| No | 95.32 | 81.58% | ||
| Radiographic Information | Joint Space Width (Medial) | Range | 2.67–7.30 mm | 0.48–8.49 mm |
| Mean | 4.71 mm | 3.93 mm | ||
| Standard Dev. | 0.86 mm | 1.35 mm | ||
| OARSI Joint Space Narrowing (Medial) | Range | 0-1 (out of 3) | 0-2 (out of 3) | |
| Mean | 0.1576 | 1.000 | ||
| Standard Dev. | 0.3644 | 0.8150 | ||
| OARSI Joint Space Narrowing (Lateral) | Range | 0-1 (out of 3) | 0-2 (out of 3) | |
| Mean | 0.02 | 0.17 | ||
| Standard Dev. | 0.13 | 0.50 | ||
| OARSI Osteophyte (Medial Femoral + Medial Tibial) | Range | 0-2 (out of 3) | 0-6 (out of 6) | |
| Mean | 0.13 | 2.19 | ||
| Standard Dev. | 0.35 | 1.55 | ||
| OARSI Osteophyte (Lateral Femoral + Lateral Tibial) | Range | 0-2 (out of 3) | 0-6 (out of 6) | |
| Mean | 0.09 | 1.47 | ||
| Standard Dev. | 0.31 | 1.57 | ||
| Symptomatic Information | WOMAC Total Score | Range | 0-62 (out of 96) | 0-96 (out of 96) |
| Mean | 7.43 | 15.60 | ||
| Standard Dev. | 10.88 | 16.68 | ||
| WOMAC Pain Score | Range | 0-15 (out of 20) | 0-20 (out of 20) | |
| Mean | 1.46 | 3.14 | ||
| Standard Dev. | 2.39 | 3.68 | ||
| WOMAC Stiffness Score | Range | 0-8 (out of 8) | 0-8 (out of 8) | |
| Mean | 1.06 | 1.82 | ||
| Standard Dev. | 1.33 | 1.73 | ||
| WOMAC Disability Score | Range | 0-43 (out of 68) | 0-68 (out of 68) | |
| Mean | 4.91 | 10.64 | ||
| Standard Dev. | 7.86 | 12.05 | ||
| Metabolic Syndromes | Body Mass Index (BMI) | Range | 17.70–43.72 | 18.51–48.73 |
| Mean | 27.93 | 30.08 | ||
| Standard Dev. | 4.48 | 4.81 | ||
| Systolic Blood Pressure | Range | 86–190 | 90–200 | |
| Mean | 121.95 | 126.67 | ||
| Standard Dev. | 15.83 | 16.16 | ||
| Diastolic Blood Pressure | Range | 44–110 | 48–120 | |
| Mean | 75.09 | 76.71 | ||
| Standard Dev. | 9.64 | 9.98 | ||
| Mean Arterial Pressure | Range | 18–98 | 18–106 | |
| Mean | 46.86 | 49.96 | ||
| Standard Dev. | 13.25 | 13.48 | ||
| Diabetes | Yes | 5.84% | 8.56% | |
| No | 91.67% | 90.01% | ||
| Missing | 2.49% | 1.43% | ||
| Living Habits | Alcohol Intake Habit | Range | 0–7 | 0–7 |
| Definition | 0: None; 1: less than once/week; 2: 1–3 drinks/week; 3: 4–7 drinks/week; 4: 8–14 drinks/week; 5: 15–21 drinks/week; 6: 22–27 drinks/week; 7: 28+ drinks/week |
|||
| Mean | 1.81 | 1.76 | ||
| Standard Dev. | 1.44 | 1.52 | ||
| Beer Intake Habit | Range | 1–9 | 1–9 | |
| Definition | 1: Never; 2: A few times per year; 3: Once/month; 4: 2–3 times/month; 5: Once/week; 6: Twice/week; 7: 3–4 times/week; 8: 5–6 times/week; 9: Every day |
|||
| Mean | 2.74 | 2.66 | ||
| Standard Dev. | 2.02 | 2.11 | ||
| Milk Intake Habit | Range | 1–9 | 1–9 | |
| Definition | 1: Never; 2: A few times per year; 3: Once/month; 4: 2–3 times/month; 5: Once/week; 6: Twice/week; 7: 3–4 times/week; 8: 5–6 times/week; 9: Every day |
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| Mean | 1.54 | 1.64 | ||
| Standard Dev. | 1.36 | 1.61 | ||
| Smoking Habit | Yes | 23.37% | 21.96% | |
| No | 76.63% | 77.46% | ||