Aerobic Fitness and Physical Activity Levels of Children Born Prematurely following Randomization to Postnatal Dexamethasone

作者：Nixon Patricia A^*; Washburn Lisa K; Mudd Lanay M; Webb Heather H; O'Shea T Michael

来源：Journal of Pediatrics, 2011, 158(1): 113-118.

DOI：10.1016/j.jpeds.2010.07.007

Objective To investigate the effects of postnatal dexamethasone treatment on aerobic fitness and physical activity levels in school-aged children born with very low birth weight (VLBW).
Study design This was a follow-up study of 65 VLBW infants who participated in a randomized controlled trial of dexamethasone (DEX) to reduce ventilator dependency. Aerobic fitness was determined from peak oxygen uptake (VO(2peak)) with a cycle ergometer. Habitual physical activity was assessed by questionnaire.
Results A trend for a treatment with an interaction between treatment and of diagnosis of chronic lung disease (CLD) was found, with the children in the placebo group with CLD having the lowest VO(2peak) (P = .09). Reduced fitness was seen in 53% of the group treated with DEX and 48% of the group given placebo. No between-group differences in physical activity were seen. Parental reports suggested that nearly two-thirds of the children participated in <1 hour per week of vigorous physical activity, which was explained in part by decreased large airway r = 0.30; P = .03).
Conclusions We found no adverse effect of postnatal DEX on aerobic fitness or habitual physical activity at school age. However, the reduced fitness and physical activity levels emphasize the need for closer follow-up and early interventions promoting physical activity to reduce the risk of chronic disease in this at-risk population. (J Pediatr 2011; 158:113-8).

• 出版日期2011-1