The willingness to take preventive action is partly determined by the perceived importance of the disease. The purpose of this study was to investigate the relationship of age, sex, education, and ethnicity to the importance of dental and other health problems by 12- to 16-year-old children. The children (361 boys, 272 girls) attending Dutch schools were asked a series of questions requiring a choice by students as to the more important problems in a given pair of conditions. Conditions included systemic, dental, and psychological problems. Nervousness was the least important problem and hearing disability the most of the nine ranked. Having full dentures was ranked third, bad teeth fifth, and toothache sixth of the nine from least (first) to most important (ninth). Age, sex, education, and ethnicity showed no relationship to importance of problems alone or in aggregate.