Hey there...I have wondered the same thing myself. See this abstract. I believe it is okay for me to post an abstract here because it is not copyrighted material:
Bipolar Disorders
Volume 2 Issue 2 Page 131 - June 2000
doi:10.1034/j.1399-5618.2000.020206.x
Relationship of childhood physical and sexual abuse to adult bipolar disorder
Mina Hyun, Seth D Friedman and David L Dunner
Objectives: To characterize whether adult depressives with either bipolar or unipolar disorder differ in the prevalence of childhood sexual or physical abuse.
Method: The investigators reviewed data from patients who were evaluated over a 2-year period by a semi-structured clinical interview. In total, 333 cases with a bipolar or unipolar diagnosis were included in the present study.
Results: A childhood history of abuse, in particular sexual abuse, was significantly more frequent in bipolar subjects compared with unipolar subjects. Consistent with previous studies, women reported higher rates of sexual abuse than men, although no interaction by diagnosis was shown. Sexual abuse incidence in male samples was markedly dissimilar, with male bipolar subjects demonstrating a significantly increased rate of sexual abuse and combined sexual and physical abuse compared with unipolar male subjects.
Conclusion: The increased incidence of sexual abuse in women supports growing evidence of gender differences in sexual abuse among adult depressives. In contrast to literature reports, the finding that male bipolar patients have significantly increased rates of sexual abuse histories suggests differences in psychiatric depressive subgroups. This result may reflect the particular characteristics of our cohort (treatment resistant, privately insured, and educated). Further work will aid in characterizing sexual abuse prevalence in other male bipolar samples.
__________________
4/2006:TLIF L5/S1
2002: C4-5 herniation
1/1999: ACDF C5-C7
| 
Bipolar Studies? 
Linear Mode
