Just noted this study does not mention atheists at all.Suicide rates are lower in religious countries than in secular ones (1, 2). Some of this difference may be due to underreporting in religious countries because of concerns over stigma (3). Yet, some of the difference may be real, although it is not known whether the negative association between religion and suicide is due to its integrative benefits (such as social cohesion, as proposed by Durkheim in 1951 ) or to the moral imperatives of religious belief, given its prohibitions against suicidal behavior (1, 5–7). Most previous studies have been epidemiologic and have investigated the association between completed suicide and religion. An inverse relationship between religious commitment and suicidal ideation has also been reported (5, 8–10). However, reports regarding religious affiliation and suicide attempt are sparse. Morphew (11) compared 50 suicide attempters hospitalized after self-poisoning with respect to their religious beliefs and practices. He found no significant differences in terms of Catholic versus Protestant affiliation. Similarly, Malone et al.(12) reported that religious persuasion, defined as Catholic and non-Catholic, did not differ between suicide attempters and nonattempters. Kok (13) compared suicide attempt rates in Chinese, Malay, and Indian women in Singapore and concluded that the comparatively low rate of attempted suicide in Malay women was due to their religion, since Islam strictly forbids suicide.
Studies of religious commitment in general suggest a protective effect as well. In a sample of institutionalized chronically ill elderly, Nelson (14) showed that intensity of religious commitment was negatively associated with suicide gestures. In a cross-national study of 25 countries, Stack (1) concluded that protective effects were not due to any specific religious denomination per se but rather to a strong religious commitment to basic life-preserving values, beliefs, and practices that reduce rates of suicide.
Therefore, we examined factors associated with religious affiliation and nonaffiliation in depressed inpatients, generally considered to be at highest risk for a suicide attempt. We hypothesized that the religious subjects would report more moral objections to suicide as measured with the Reasons for Living Inventory (15). This instrument includes questions that reflect traditional religious beliefs: "I believe only God has the right to end a life," "My religious beliefs forbid it," "I am afraid of going to Hell," and "I consider it morally wrong." We examined the relationship between religious affiliation and social cohesion by examining the amount of time spent with relatives in religiously affiliated versus unaffiliated patients. To our knowledge, this is the first study investigating the relationship between religious affiliation status and suicide attempts in a clinical sample.
Again, according to your logic, Islam is the best for mental health.