Psychometric properties of the Illness Attitudes Scale in psychiatric patients.

This study assessed the factorial structure of the 29-item Illness Attitudes Scale in a population of 82 psychiatric patients hospitalized for gastrointestinal complaints. Factor analysis yielded three factors of the Illness Attitudes Scale in these patients, which have been interpreted Health Anxiety, Illness Behavior, and Health Habits. The internal consistency of these factors, estimated by Cronbach alpha, were .86, .80, and .58, respectively. The Health Anxiety and Illness Behavior scores were significantly intercorrelated .43, but scores on Health Habits were not significantly correlated with either Health Anxiety (r = .19) or Illness Behavior (r = .14). These findings are consistent with previous reports that two factors of the Illness Attitudes Scale possess reliable psychometric properties. Cross-validation with other patient populations is required to confirm the validity of the Illness Attitudes Scale factor structure testing at least 5 participants per item of the scale.