K-T Kang

Publications (2)8.69 Total impact

• Article: Impacts of body weight after surgery for obstructive sleep apnea in children.

  W-C Hsu, K-T Kang, W-C Weng, P-L Lee
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  ABSTRACT: Objective:To investigate the impacts of body weight status on surgical outcomes and shifts of body weight status after adenotonsillectomy(T&A) in children with obstructive sleep apnea (OSA).Methods:From 2009 to 2011, 161 children (mean age, 7.0±3.4 years; 78% boys) were included. All the children had clinical symptoms and preoperative polysomnographic evaluations diagnosis of OSA. Children were divided into four weight status groups (underweight, normal weight, overweight and obese), based on age and gender corrected body mass index (BMI).Results:Following T&A, the four different weight status groups significantly improved in apnea/hypopnea index (AHI) and minimum oxygen saturation. However, 49.1% of the children (79/161) had residual OSA (AHI 1). The incidence of residual OSA (AHI 1) in the obese group was 75%, which was significantly higher than the other three groups (P<0.01). Weight status changes after T&A were documented, and 54% (13/24) of the underweight children shifted to normal weight status within 6 months after surgery.Conclusion:Although sleep parameters improved in all weight statuses, obese children had a higher incidence of residual OSA postoperatively. About half of the underweight children shifted to normal weight status after T&A.International Journal of Obesity advance online publication, 27 November 2012; doi:10.1038/ijo.2012.194.
  International journal of obesity (2005) 11/2012; · 4.34 Impact Factor
• Article: Body weight status and obstructive sleep apnea in children.

  K-T Kang, P-L Lee, W-C Weng, W-C Hsu
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  ABSTRACT: The relationship between weight status, adenotonsillar hypertrophy and obstructive sleep apnea (OSA) in children has not yet been well studied. As the sleep parameters may show a disparity in different weight statuses, this study examined the relationship between the data of over-night polysomnography and different weight statuses, as well as the impact of adenotonsillar hypertrophy on children with OSA. Children with sleep disturbances were recruited from our clinics. Standard physical examinations, history taking, lateral neck roentgenography, and full-night polysomnography were obtained. Children were divided into four groups based on the age- and gender-corrected body mass index (BMI): underweight, normal weight, overweight and obese. An adenoidal/nasopharyngeal ratio of more than 0.67 was considered adenoidal hypertrophy. Tonsillar hypertrophy was defined as having Grade III tonsils or above. From July 2006 to January 2009, 197 children were included in this study. Obese children had a significantly higher apnea-hypopnea index (AHI), obstructive apnea index and lower minimum oxygen saturation (MinSaO(2)) than those of the other groups. Underweight children had the second highest AHI. A negative correlation was also found between BMI z scores and MinSaO(2) (r = -0.194; P = 0.007). Children with tonsillar hypertrophy (P = 0.001) were associated with a higher risk of having OSA. The risk of having OSA was significantly higher in obese children (P = 0.001) and underweight children (P = 0.043) than in those with a normal weight. Obesity, underweight status and tonsillar hypertrophy are associated with children having OSA, and obese children have a significantly higher risk than children with underweight status.
  International journal of obesity (2005) 01/2012; 36(7):920-4. · 4.34 Impact Factor