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A new study provides the best evidence yet that wearing a back brace(±³³Å) will slow the progression of the most common form of scoliosis(±³³Å) in adolescents, helping them avoid painful spine(¼¹Öù) operation.

Doctors have recommended bracing for more than 50 years, but until now, there was limited evidence that bracing and other conservative treatments relieved back pain or improved quality of life in patients.

¡°When you have teenagers who are anxious about wearing a brace to school or what their friends will think, it gave us a bit of heartache to try to convince them if we weren¡¯t certain ourselves,¡± said Dr. Paul D. Sponseller at Johns Hopkins Children¡¯s Center, who was not involved in the study. ¡°In light of this new evidence, we can say we really do have a basis for putting them through bracing.¡±

In the study, researchers led by Dr. Stuart L. Weinstein at the University of Iowa analyzed data on 242 young patients. The children were all aged 10-15 and they all had a spinal curvature(¼¹ÖùÍäÇú) of 20-40 degrees.

The patients were divided into two groups. One group were used for observation(they did not use bracing) ; the other group were required to wear the brace for at least 18 hours daily

In the analysis that included both groups, the rate of treatment success was 72% among children with bracing, compared with 48% among those under observation. The benefit increased when the participants had longer bracing hours. More than 90% of the children who were successfully treated wore their braces more than 13 hours a day.

When her daughter Maddie was diagnosed with scoliosis at age 10, Becky Houser, of North Liberty, Iowa, wanted to avoid operations ¡°at all costs.¡± So Maddie, a participant in Weinstein¡¯s study, chose to wear a brace.

¡°We didn¡¯t want to not do anything,¡± said Houser, who underwent an operation for scoliosis thirty years ago.

After three years of bracing, Maddie, now 13, was thrilled to learn that her spinal curvature was holding steady at 28 degrees. She no longer needs bracing because she has reached the age when children achieve bone maturity.

¡°We are extremely relieved,¡± Houser said.

¡¾1¡¿ In the past, when Sponseller recommended bracing he .

A. tried to improve the treatment

B. was unsure about its effectiveness

C. was worried about patients¡¯ life quality

D. considered other people¡¯s opinions first

¡¾2¡¿ Most participants using the brace found .

A. it was a successful treatment

B. long bracing hours were harmful

C. it had both advantages and disadvantages

D. those under observation recovered mush faster

¡¾3¡¿What was Houser¡¯s attitude towards the spine operation?

A. She was uncertain about it.

B. She was hopeful of it.

C. She disapproved of it.

D. She tolerated it.

¡¾4¡¿ Why was Houser¡¯s family extremely relieved?

A. Houser was successful treated.

B. Maddie¡¯s scoliosis was under control.

C. The research was eventually completed.

D. Conservative treatments were finally accepted.

¡¾5¡¿ What is the passage mainly about?

A. The spinal curvature¡¯s progression.

B. The most common form of scoliosis.

C. A detailed analysis of spine operation.

D. A new study on the effectiveness of bracing.

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