Figure 4. Number of subjects in whom a diagnosis was made on each recorded night.

On the first night, only two subjects met criteria for sleep bruxism (> 2 RMMA episodes/h). Six subjects met criteria for sleep bruxism on the second night and seven subjects on the third night. Both of the subjects that met criteria on the first night, also met criteria on nights 2 and 3 (illustrated with the black bar). Two of the four subjects that met criteria for the first time on the second night also met criteria on the third night (gray bar).