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1.
Figure 2

Figure 2. From: Increasing Prevalence of Knee Pain and Symptomatic Knee Osteoarthritis.

Age and BMI-adjusted prevalence and 95% Confidence Intervals of Knee Pain for Framingham OA Study across 3 examination periods between 1983 and 2005. Solid line is for female and broken line for males. Test for trend in men (p < 0.001) and women (p < 0.001). Framingham Osteoarthritis Study cohorts between 1983 through 2005 for knee pain outcome: Original 1983–5 and 1992–5, Offspring and Community sample 2002–5.

Uyen-Sa D. T. Nguyen, et al. Ann Intern Med. ;155(11):725-732.
2.
Figure 3

Figure 3. From: Increasing Prevalence of Knee Pain and Symptomatic Knee Osteoarthritis.

Age and BMI-adjusted prevalence and 95% Confidence Intervals of Radiographic and Symptomatic knee OA across 3 examination periods between 1983 and 2005. ROA, radiographic osteoarthritis of the knee (Kellgren-Lawrence score ≥ 2); test for trend from 1983–2005 in men (p = 0.82) and women (p = 0.036). SxOA: symptomatic osteoarthritis of the knee (knee pain in the ROA knee); test for trend from 1983–2005 in men (p < 0.001) and women (p = 0.006). Framingham Osteoarthritis Study cohorts between 1983 through 2005 for symptomatic knee osteoarthritis outcome: Original 1983–5 and 1992–5, Offspring and Community sample 2002–5; and for radiographic osteoarthritis outcome: Original cohort 1983–5 and 1992–5, Offspring 1992–95 and 2002–5, and Community sample 2002–5.

Uyen-Sa D. T. Nguyen, et al. Ann Intern Med. ;155(11):725-732.
3.
Figure 1

Figure 1. From: Increasing Prevalence of Knee Pain and Symptomatic Knee Osteoarthritis.

Sampling weighted and age and BMI-adjusted prevalence, along with 95% Confidence Intervals, of Knee Pain for Non-Hispanic White & Mexican American Participants across 6 NHANES surveys between 1971 and 2004. Solid line is for female and broken line for males. Test for trend from 1974 to 1994 in men (p = 0.003) and women (p = 0.002). Test for trend from 1999 to 2004 in men (p = 0.090) and women (p = 0.012).
The corresponding age and BMI-adjusted prevalence of knee pain in African American men from 1974 to 1994, was 12.6%, 10.7%, and 15.6%; p-trend=0.35. The corresponding prevalence in women over the first three NHANES was 16.7%, 22.0%, and 28.7%; p-trend=0.037. For the subsequent three continuous NHANES, prevalence of knee pain for men was 7.9%, 16.6%, and 18.6%; p-trend=0.22. The corresponding prevalence of knee pain in women over the later three NHANES was 13.8%, 22.2%, and 29.9%; p-trend=0.003.

Uyen-Sa D. T. Nguyen, et al. Ann Intern Med. ;155(11):725-732.

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