[Prevalence of central sleep apnea in different age groups of children with sleep apnea-hypopnea].

Objective: To explore the prevalence of central sleep apnea in different age groups of children with sleep apnea-hypopnea (SAH).

Methods: A total of 431 children with SAH diagnosed by overnight polysomnography at our Sleep Center were retrospectively studied. They were divided into 3 groups based on their ages: toddler group (1 - < 3 years old), preschool group (3 - < 6 years old) and school group (6 - < 13 years old).