Biorhythms revisited: rhythm and blues?

In a previous study, no significant relationship was seen between date of psychiatric admission or psychiatric emergency room visit and various phases or critical days in the biorhythm cycle. The present study evaluated these relationships for date of admission of 313 patients--192 with major depression, 88 with bipolar disorder, and 33 with schizophrenia or other diagnoses. No significant relationship to critical days or any combination of critical/noncritical days was found. Two further analyses failed to reveal any significant relationship between admission date and ascendant versus recuperative phases or any combination of cycle and phase. No differences were seen between affectively ill and other patients on any measures evaluated.