The available data suggest a statistical link between sexual abuse in childhood and later attempts of suicide for women (Romans et al, 1995, Ernst et al. 1993, Yeo & Yeo 1993). But evidence does not support a link between suicidality and childhood sexual experiences in the absence of force or threat of force (Beitchman et al, 1992).
Windle et al. 1995 have found: "Lifetime suicide attempts were also predicted by abuse status variables (physical abuse only for men and dual abuse for both men and women)." Thus, for men physical abuse seems to be even more important than sexual abuse.
Instead, for women sexual abuse seems to be more important than physical abuse.
Bryant & Range 1995 found in a study about 182 women that "women who reported sexual abuse were more suicidal than all other groups, and those physically abused were more suicidal than those nonabused/nonpunished. In a multiple regression, sexual abuse accounted for the most variance in suicidality (15%)." Similarly, Farber et.al. 1996 have found "that women reporting a history of childhood sexual abuse, physical abuse, or both were significantly more likely than those not reporting a history of abuse to evidence suicidal ideation ... Additionally, those reporting a history of sexual abuse or both physical and sexual abuse were more likely than those not reporting such a history to have made a suicide attempt in the past".
There seems to be agreement that combined abuse is especially dangerous. Brown & Anderson 1991 have found suicidality more frequent in abused than nonabused inpatients and was noted in 79% of the patients with histories of combined abuse. Windle et al. 1995 note that "dual abuse was an especially potent predictor, increasing the probability of a suicide attempt almost fivefold among male and female alcoholics." The numbers given by Richter-Appelt 1994 (none 2%, physical 5%, sexual 12%, dual 22%) are in agreement with these results.
Other studies, for example Cohen 1996, have not found a difference in suicidal behavior between sexual and physical abuse. Richie & Johnson 1996 found among incarcerated women "that an association exists between childhood physical and sexual abuse and drug use, suicide attempts, and homelessness in adulthood."
The abuse/suicide correlation seems to be related with other suspected impact of sexual abuse: borderline personality disorder (Dubo 1997); eating disorders (Casper 1997);
Beautrais et.al. 1996 have found that young people making serious suicide attempt reported elevated rates of psychiatric morbidity (p<0.0001) together with social disadvantage (p<0.0001) and exposure to childhood adversity (p<0.05).
There is not much evidence for any direct association between volitional sexual relations and suicide attempts.
On the other hands, there are some cases of suicidal behavior of children related with the adverse reaction of society after disclosure of a pedosexual relation. I think, in this case not the pedophile, but the society should be blamed for this harm.
See also here.