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Difficulty Falling Asleep

180 hospitalized patients with expressed difficulties falling asleep were compared with 131 control patients on a psychological problem inventory to investigate the heightened anxiety view of insomnia. Cross-validated results indicated that (a) groups were not differentiated on the basis of anxiety, and (b) groups were differentiated on 44 of 149 items occurring in four factors: somatization, depression, dependent rejection, and decreased control.