What are the risk factors for otitis media in children?

I. Age
II. Gender
III. Race
IV. Craniofacial anomalies
V. Genetic predisposition
VI. Allergy
VII. Immune competence
VIII. Upper respiratory infection
IX. Seasonality
X. Daycare
XI. Siblings
XII. Exposure to tobacco smoke
XIII. Breastfeeding
XIV. Pacifier use
XV. Socioeconomic status