Prevalence of radiographic osteoarthritis of the knee and its relationship to self-reported pain

Lan T Ho-Pham, Thai Q Lai, Linh D Mai, Minh C Doan, Hoa N Pham, Tuan V Nguyen, Lan T Ho-Pham, Thai Q Lai, Linh D Mai, Minh C Doan, Hoa N Pham, Tuan V Nguyen

Abstract

Background and aim: Osteoarthritis (OA) of the knee is one of the most common skeletal disorders, yet little data are available in Asian populations. We sought to assess the prevalence and pattern of radiographic OA of the knee, and its relationship to self-reported pain in a Vietnamese population.

Methods: The study was based on a sample of 170 men and 488 women aged ≥40 years who were randomly sampled from the Ho Chi Minh City (Vietnam). Radiographs of the knee were graded from 0 to 4 according to the Kellgren and Lawrence scale. Osteoarthritis was defined as being present in a knee if radiographic grades of 2 or higher were detected. Knee pain and symptoms were ascertained by direct interview using a structured questionnaire.

Results: The point prevalence of radiographic OA of the knee was 34.2%, with women having higher rate than men (35.3% vs 31.2%). The prevalence of knee OA increased with advancing age: 8% among those aged 40-49 years, 30% in those aged 50-59 years, and 61.1% in those aged ≥60 years. Greater BMI was associated with higher risk of knee OA. Self-reported knee pain was found in 35% of men and 62% of women. There was a statistically significant association between self-reported knee pain and knee OA (prevalence ratio 3.1; 95% CI 2.0 to 4.6).

Conclusions: These data indicate that approximately a third of Vietnamese men and women have radiographic OA in the knee, and that self-reported knee pain may be used as an indicator of knee osteoarthritis.

Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1. Prevalence of osteoarthritis of the…
Figure 1. Prevalence of osteoarthritis of the knee in 170 men and 488 women aged ≥40 years classified by age.
Figure 2. Prevalence of osteoarthritis of the…
Figure 2. Prevalence of osteoarthritis of the knee classified by body mass index group in 170 men and 488 women aged ≥40 years.
Figure 3. Prevalence of osteoarthritis of the…
Figure 3. Prevalence of osteoarthritis of the knee classified by the number of knee complaints or symptoms among 170 men and 488 women aged ≥40 years.
The solid bar shows the prevalence of knee OA, and the cross-hatched bar shows the proportion of individuals with 0, 1, 2, …, 7+ knee complains/symptoms.

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Source: PubMed

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