Short-term effects of hip abduction exercise on Graf typeⅡa hip joint in infants

doi:10.3877/cma.j.issn.1672-6448.2019.11.012

Abstract

Abstract:

Objective

To analyze short-term effects of hip abduction exercise on Graf type IIa hip joint in infants.

Methods

A total of 78 infants born at Haiyan County Maternal and Child Health Hospital from January 2017 to June 2017 were diagnosed with Graf type II a hip joints (90 hips) by ultrasound using the static Graf method. They were selected and randomly divided into either an intervention group (n=41, 47 hips) or a control group (n=37, 43 hips). The intervention group was treated by hip abduction exercise, while the control group did not. After 1~2 months, ultrasound examination was performed to compare the improvement of the α angle in the two groups. The Student′s t-test was used for comparing the age at initial examination, age at reexamination, interval of reexamination, initial α angle, α angle at reexamination, and the improvement of the α angle between the intervention group and the control group. The χ² test was used to compare the sex ratio of the infants between the two groups.

Results

The α angle increased in both the intervention group and control group (t=12.71 and 13.63, respectively, P<0.001), and the improvement of α angle in the intervention group was more significant than that in the control group (t=2.219, P=0.029). There were no significant differences in the gender ratio, age at initial examination, age at reexamination, or interval of reexamination between the two groups (P>0.05).

Conclusion

Compared with the natural outcome, hip abduction exercise can promote Graf IIa hip joint maturity in the short term.

Key words: Graf type IIa, Hip, Abduction exercise

Mingmin Xu, Shengqun Ma, Xiaoling Gan, Ting Wang. Short-term effects of hip abduction exercise on Graf typeⅡa hip joint in infants[J]. Chinese Journal of Medical Ultrasound (Electronic Edition), 2019, 16(11): 857-859.

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URL: https://chaosheng.cma-cmc.com.cn/EN/10.3877/cma.j.issn.1672-6448.2019.11.012

https://chaosheng.cma-cmc.com.cn/EN/Y2019/V16/I11/857

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References 16

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组别	例数	性别（女，例）	初查年龄（d，±s）	复查年龄（d，±s）	复查间隔（d，±s）
干预组	41	32/41	46.81±8.46	89.45±18.15	42.64±18.25
对照组	37	27/37	47.42±9.27	93.33±20.59	45.91±21.44
统计值	?	χ²=0.27	t=0.326	t=0.950	t=0.781
P值	?	>0.05	>0.05	>0.05	>0.05

组别	例数	性别（女，例）	初查年龄（d，±s）	复查年龄（d，±s）	复查间隔（d，±s）
干预组	41	32/41	46.81±8.46	89.45±18.15	42.64±18.25
对照组	37	27/37	47.42±9.27	93.33±20.59	45.91±21.44
统计值	?	χ²=0.27	t=0.326	t=0.950	t=0.781
P值	?	>0.05	>0.05	>0.05	>0.05

组别	个数	α角
组别	个数	干预前	干预后	改善角度
干预组	47	57.69±2.00	63.77±3.18^a	6.08±3.27
对照组	43	58.11±1.66	62.85±2.01^a	4.75±2.28
t值	?	1.078	1.623	2.219
P值	?	>0.05	>0.05	<0.05

组别	个数	α角
组别	个数	干预前	干预后	改善角度
干预组	47	57.69±2.00	63.77±3.18^a	6.08±3.27
对照组	43	58.11±1.66	62.85±2.01^a	4.75±2.28
t值	?	1.078	1.623	2.219
P值	?	>0.05	>0.05	<0.05

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