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. 2017 Jun 5;130(11):1261-1268.
doi: 10.4103/0366-6999.206357.

Prevalence of Developmental Dysplasia of the Hip in Chinese Adults: A Cross-sectional Survey

Feng-De Tian  1 , De-Wei Zhao  1 , Wei Wang  2 , Lin Guo  2 , Si-Miao Tian  2 , Ao Feng  2 , Fan Yang  2 , Dong-Yi Li  2
Affiliations

Prevalence of Developmental Dysplasia of the Hip in Chinese Adults: A Cross-sectional Survey

Feng-De Tian et al. Chin Med J (Engl). .

Abstract

Background: The prevalence of developmental dysplasia of the hip (DDH) is unknown in China. We aimed to determine the prevalence of DDH in Chinese adults.

Methods: In this study, we performed a cross-sectional survey of a nationally representative sample of Chinese adults. All participants underwent questionnaire investigation, physical examination, and X-ray examination. Factors associated with DDH were analyzed with logistic regression.

Results: We invited 29,180 individuals aged 18 years and over to participate, randomly selected from 18 primary sampling units (street districts in urban areas and townships in rural areas). The survey and examination were completed in 25,767 people (10,296 men and 15,471 women). DDH was diagnosed in 391 people, yielding an overall DDH prevalence of 1.52%. Based on this information, we estimate the number of individuals with DDH in China to be approximately 16.05 million. DDH prevalence increased with age (odds ratio = 1.53 [1.03-2.27], P = 0.036), was significantly higher among women than men (2.07% vs. 0.75%, P< 0.001), and was higher among rural residents than urban residents (1.75% vs. 1.29%, P< 0.001). Economic development was independently associated with the presence of DDH. There was no evidence of an association between body mass index alone, education, or current smoking or drinking and risk of DDH (P > 0.05).

Conclusions: DDH has become an important public health problem. Special attention should be paid to residents with DDH. Screening for DDH should be performed in China.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Prevalence of DDH stratified by gender. (a) Prevalence of DDH according to age. (b) Prevalence of DDH according to BMI level. (c) Prevalence of DDH according to residence. (d) Prevalence of DDH according to region. BMI: Body mass index; DDH: Developmental dysplasia of the hip.
Figure 2
Figure 2
Previously and newly diagnosed DDH participants. (a) The number of DDH patients was stratified by gender. (b) The number of DDH patients was stratified by age. (c) The number of DDH patients was stratified by DDH phase according to the Crowe classification. DDH: Developmental dysplasia of the hip.
See this image and copyright information in PMC

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