在大多数发达国家，DDH发病率估计约1.5-20/ 1000。[2]Patel H, Canadian Task Force on Preventive Health Care. Preventive health care, 2001 update: screening and management of developmental dysplasia of the hip in newborns. CMAJ. 2001;164:1669-1677.http://www.cmaj.ca/cgi/content/full/164/12/1669http://www.ncbi.nlm.nih.gov/pubmed/11450209?tool=bestpractice.com英国最新的新生儿 DDH 筛查回顾显示，活产婴儿 DDH 发病率一般为 1~2/1000。[3]Eastwood DM. Neonatal hip screening. Lancet. 2003;361:595-597.http://www.ncbi.nlm.nih.gov/pubmed/12598157?tool=bestpractice.com缺乏明确的诊断标准，以及在 DDH范畴中从轻度到重度的较广范围的解剖变异，均会影响 DDH 发病率数据可靠性。随着临床及超声筛查的出现，DDH 报道的发病率明显增加，表明有可能过度诊断。[4]Bialik V, Bialik GM, Blazer S, et al. Developmental dysplasia of the hip: a new approach to incidence. Pediatrics. 1999;103:93-99.http://www.ncbi.nlm.nih.gov/pubmed/9917445?tool=bestpractice.com绝大多数 DDH 患者可在一岁内明确诊断，其中大多数患者在一月内即可明确诊断。女孩更容易患 DDH，其发患病风险较男孩高 4 倍。[4]Bialik V, Bialik GM, Blazer S, et al. Developmental dysplasia of the hip: a new approach to incidence. Pediatrics. 1999;103:93-99.http://www.ncbi.nlm.nih.gov/pubmed/9917445?tool=bestpractice.com在美国，白人的发病率较黑人高。该病症也更常见于足月或接近足月的臀位产儿。[4]Bialik V, Bialik GM, Blazer S, et al. Developmental dysplasia of the hip: a new approach to incidence. Pediatrics. 1999;103:93-99.http://www.ncbi.nlm.nih.gov/pubmed/9917445?tool=bestpractice.com[5]Shipman SA, Helfand M, Moyer VA, et al. Screening for developmental dysplasia of the hip: a systematic literature review for the US Preventive Services Task Force. Pediatrics. 2006;117:e557-e576.http://pediatrics.aappublications.org/cgi/reprint/117/3/e557http://www.ncbi.nlm.nih.gov/pubmed/16510634?tool=bestpractice.com
