Who can have sleep apnea?

Anyone. Anyway can have sleep apnea. Young/old, male/female, obese/underweight, healthy/multiple medical problems. There are a lot of risk factors you wouldn't think about including smoking, reflux and congenital deformities even when repaired (cleft palate).
Sleep apnea. Anybody, but most commonly overweight persons with short and wide neck and with narrow upper airway. If you snore, are sleepy, have diabetes, high blood pressure, previous strokes, coronary artery disease or atrial fibrillation, you should be checked.