title: Understanding presurgical anxiety.
mesh_terms: D000328:Adult; D000368:Aged; D001007:Anxiety; D003858:Dependency, Psychological; D005260:Female; D006801:Humans; D007389:Internal-External Control; D008297:Male; D013527:Perioperative Nursing; D010551:Personality; D011300:Preoperative Care; D012068:Religion and Medicine; D013315:Stress, Psychological; D013514:Surgical Procedures, Operative