Congenital Dislocation of the Hip Joint in Norway

Congenital dislocation of the hip in Finland: An epidemiologic analysis of 1035 cases

“…No accept- Seasonal variation in the occurrence of CDH has been reported in several countries, but the results are somewhat contradictory (Figure 3). In Japan and Hungary, more CDH patients than expected were born in the winter months (Nagura 1955, Pap 1956 Bjerkreim (1974) found a positive family history about as often as it was found in the present investigation. Cyvin's (1977) figures are considerably higher: 18 per cent in boys and 20 per cent in girls.…”

“…Such patients have certainly been included in various materials, but it is difficult to estimate their number. The frequency of CDH in the present material is lower than in most Scandinavian studies, where it varies between 8.0 per mille and 19 per mille (Bjerkreim 1974, Fredensborg 197613, Parvinen 1972, Almby & Rehnberg 1977, Cyvin 1977. In England, Jones (1977) reported an incidence of only 2.6 per mille.…”

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“…DDH affects both hips in approximately 30-40% of the cases (4,5). In cases of unilateral disease, the left hip is more often affected than the right (4,5). More girls are affected than boys: for example, neonatal hip instability is about 3-4 times more common in girls than in boys (5,6) while for DDH presenting in later childhood, the ratio of girls to boys is approximately 5:1 (4,7,8).…”

“…The sonographic prevalence of DDH is higher again, between 2 and 4% (3). DDH affects both hips in approximately 30-40% of the cases (4,5). In cases of unilateral disease, the left hip is more often affected than the right (4,5).…”

Late diagnosis in congenital dislocation of the hip

“…-The dislocation test did not work (Williamson 1972). -The dislocation was not present at birth but developed later (Bjerkreim 1974).…”