To swaddle, or not to swaddle? paleoepidemiology of developmental dysplasia of the hip and the swaddling dilemma among the indigenous populations of <scp>N</scp>orth <scp>A</scp>merica

Blatt, Samantha H.

doi:10.1002/ajhb.22622

Cited by 23 publications

(17 citation statements)

References 85 publications

(98 reference statements)

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“…An environmental factor involves infant transport and clothing. DDH was very high in Native Americans in earlier studies [ 6 , 73 ], due to tight swaddling of the infant in most Native American societies. There was a 10-fold increase in DDH (123.0 vs. 12.6) in Canadian Native Americans when infants were placed in a cradleboard [ 74 ].…”

Section: Discussionmentioning

confidence: 99%

The demographics of developmental hip dysplasia in the Midwestern United States (Indiana)

Loder

Shafer

2015

Journal of Children's Orthopaedics

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BackgroundToday’s society is much more mobile than in the past. This increased mobility has resulted in different marriage/parenting groups. We wished to study the demographics of developmental dysplasia of the hip (DDH) in our area and compare/contrast our findings with those in the literature and specifically look for new findings compared to previous studies.MethodsA retrospective review of all children with DDH from 2003 through 2012 was performed. The age at first visit, gestational age, pregnancy number, gender, race, and family history of DDH was collected. Statistical significance was a p-value < 0.05.ResultsThere were 424 children (363 girls, 61 boys). Ethnicity was White in 80.8 %, Hispanic in 13.8 %, Black in 4.0 %, and Indo-Malay and Indo-Mediterranean in 0.7 % each; 66.8 % were unilateral; 14.2 % had a positive family history. The average gestational age was 38.1 weeks; 94.4 % were full term. The child was vertex presentation in 67.6 % and breech in 32.4 %; 52.8 % were delivered vaginally and 47.2 % by Cesarean section. The child was the first-born in 48.3 %. When compared to the birth statistics of our state, there was a higher proportion of Whites and Hispanics with DDH, and a lower, but not inconsequential, proportion of Blacks (p = 0.0018).ConclusionMixing of gene pools and infant carrying methods (lack of swaddling or marked abduction) occurring with societal change likely explains the higher than expected proportion of DDH amongst those of Hispanic ethnicity and a lower than expected, but not rare, proportion in those of African ancestry.Level of evidenceLevel IV—retrospective case series.

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Section: Discussionmentioning

confidence: 99%

The demographics of developmental hip dysplasia in the Midwestern United States (Indiana)

Loder

Shafer

2015

Journal of Children's Orthopaedics

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“…The proposed explanation is that puppies born in winter spend more time in cages/indoors than in free activities, and indoor confinement may keep the hips in flexion and abduction lessening the development of CHD [29]. The same has been noted in human DDH, where carrying the infant in positions of hip abduction and flexion reduces the incidence of DDH [31–35] while swaddling in extension increases the incidence of DDH [5, 36, 37]. Our results refute a winter protective effect in CHD.…”

Section: Discussionmentioning

confidence: 99%

The Demographics of Canine Hip Dysplasia in the United States and Canada

Loder

Todhunter

2017

Journal of Veterinary Medicine

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Canine hip dysplasia (CHD) is a common problem in veterinary medicine. We report the demographics of CHD using the entire hip dysplasia registry from the Orthopedic Foundation for Animals, analyzing differences by breed, sex, laterality, seasonal variation in birth, and latitude. There were 921,046 unique records. Each dog was classified using the American Kennel Club (AKC) and Fédération Cynologique Internationale (FCI) systems. Statistical analysis was performed with bivariate and logistic regression procedures. The overall CHD prevalence was 15.56%. The OR for CHD was higher in females (1.05), those born in spring (1.14) and winter (1.13), and those in more southern latitudes (OR 2.12). Within AKC groups, working dogs had the highest risk of CHD (OR 1.882) with hounds being the reference group. Within FCI groups, the pinscher/molossoid group had the highest risk of CHD (OR 4.168) with sighthounds being the reference group. The similarities between CHD and DDH are striking. Within DDH there are two different types, the typical infantile DDH and the late onset adolescent/adult acetabular dysplasia, with different demographics; the demographics of CHD are more similar to the later onset DDH group. Comparative studies of both disorders should lead to a better understanding of both CHD and DDH.

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“…2 Significant changes in the type of collagen, the fibril diameter, and the nature of the crosslinks in the joint capsules of subjects with DDH were reported, but these changes were probably tissue specific since no detectable change could be observed in the skin of Figure 3 The correlation of TOS with prolidase activity Figure 4 The correlation of OSI with prolidase activity these subjects compared to the controls. 26,27 This change in structure of collagen in DDH leads to increased collagen breakdown and turnover. It is known that increased rates of collagen synthesis may lead to a change in the quality of collagen fibres.…”

Section: Discussionmentioning

confidence: 99%

Serum prolidase activity and oxidative–antioxidative status in patients with developmental dysplasia of the hip and its relationship with radiographic severity

et al. 2016

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To swaddle, or not to swaddle? paleoepidemiology of developmental dysplasia of the hip and the swaddling dilemma among the indigenous populations of North America

Cited by 23 publications

References 85 publications

The demographics of developmental hip dysplasia in the Midwestern United States (Indiana)

The demographics of developmental hip dysplasia in the Midwestern United States (Indiana)

The Demographics of Canine Hip Dysplasia in the United States and Canada

Serum prolidase activity and oxidative–antioxidative status in patients with developmental dysplasia of the hip and its relationship with radiographic severity

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