The aim of the present study was to investigate the relationship between lifestyle of parents with common psychiatric disorders in children and adolescents (in 2016). Based on multivariable logistic results and after adjusting the role of confounding variables, a significant direct association was found between parents’ physical health dimension with OCD in children. This finding was consistent with a study by Koran et al. (
23) which showed that the physical health of people suffering from OCD was better than the anxiety group. However, this finding was in contrast with the results of the study by Witthauer et al. (
24) which showed that physical diseases with specific disability have more links to OCD than obsessive compulsive symptoms (OCS). In order to justify the inconsistency with the previous study, we can point to the study population of these two studies: Witthauer et al. studied people in the age range of 18 to 65 years, while our study includes children aged 6 to 18 years. On the other hand, OCD is more psychological in nature: Hence the physical health of parents may not affect the mental health of their children (
24). Based on the results, the disease prevention dimension had a direct and significant relationship with practical obsessive-compulsive disorder in children. In a study conducted in the general population and diabetes groups of the United States, the quality of life (which is also an important tool for effectiveness of roles and social function) in patients with obsessive-compulsive disorder is in a worse situation as compared to those who have chronic noncontagious diseases. However, in that study, the statistical population of the people was 40 years and older, and only the quality of life of two groups of society was compared: The study of lifestyle dimensions and the impact of obsessive-compulsive disorder had not been addressed in this research (
24). Literature has suggested that OCD and ADHD may have a physiological nature which means that their relationship with the physical health of parents can be explained by common genetic bases of some different disorders. Also, Taylor et al, have shown an association between OCD with genetic and environmental factors (
25).
Also, there was a significant relationship between parents’ spiritual health with OCD in children. In other words, with increase in spiritual health of parents, the rate of this disorder decreases in children. Other studies also reported that people with practical obsessive-compulsive disorder were more religious in comparison to other patients: i.e., people with higher degrees of religiosity were more likely to have this disorder than those with lower degrees of religiosity (
26,
27). A 28-years old study, with participation of 5286 adults (aged 21 - 65 years), showed that people who had frequent visits (more than once a week) to religious services had a higher life and longevity as compared to absence (
28). Individuals of some religious groups may have unrealistic expectations of themselves, which leads to isolation, stress, and anxiety; or they may feel alienated with those who do not believe in their belief. Finally, it is well-known that unhealthy belief systems can negatively affect health (
29). In interpreting some contradictory results of these studies, it should be remembered that research has actually been done about different concepts in different populations in terms of beliefs and practices by using different tools (
30). In addition, the results show that with the increase in the mean of avoidance of drugs in parents, the level of obsessive-compulsive disorder significantly decreases in children. This finding is consistent with the results of studies that report decrease in the level of psychological disorders by increasing the life level (
31,
32). Also, another study by Suzuki et al. showed that there is a significant and inverse relation between lifestyle and psychological disorders (
33). However, in the above studies, only the general lifestyle and its relationship with psychological disorders are discussed and there are no references to lifestyle factors.
The association between depression and different dimensions of lifestyle has been reported in previous studies. For instance, in Demura and Sato study, there was a direct correlation between depression and sports and fitness (
34). In another study, smoking and alcohol were factors affecting the development of depression in women (
35). Also, a number of previous studies have shown that physical activity has an effective role on depression (
36,
37). In addition, in Japan it has been reported that healthy lifestyles can prevent depression in the elderly, as well as the relationship between smoking, overweightness and inappropriate sleep, may be increase the risk of depression and memory loss (
35,
38). However, in our study, depression disorder was significant only with total lifestyle score (
Table 2) and no significant association was found between depression with different dimensions of lifestyle.
Also, in a study by Haffner et al. significant relationship between attention deficit/hyperactivity disorder and sports and fitness was found (
39). According to the results of this study, a positive and meaningful relationship was found between this disorder and the sport and fitness dimension as part of the lifestyle of parents. This finding matches with Gapin and Etnier who investigated the effect of 20 sessions of yoga exercises on children aged 8 to 13 years and found that exercise therapy improves disorder in children with ADHD (
40). Additionally, there is much evidence which mainly consider ADHD as a genetic and neurological disorder (
41-
43), but this cannot diminish the importance of family role in the management of their children behavior.
Also, according to the results of the study, by increasing the average of social health of parents, hyperactivity disorder increases in children. However, the results of a study showed that children with ADHD had lower levels of social skills and lower self-esteem than the general population (
44): This could be due to cultural differences as well as the age of the study population. There are studies which do not support the above hypothesis, i.e. children with ADHD have higher self-esteem than children without ADHD, but interpersonal relationships are weaker than in other children (
45). However, the above studies only investigated hyperactivity disorder and its association with self-esteem and social skills in children and did not measure the impact of social health of parents on the level of this disorder.
There was a meaningful and inverse relationship between the mental health of parents and SAD in children. The results of this finding are consistent with the study by Chang et al. which state that mental health of mother is effects behavioral and anxiety disorders in children (
46). It is also consistent with the results of Guethmundsson and Tomasson (
47) and Foley et al. (
48). According to these researches, it can be concluded that children are among the groups at risk of mental illness and that one of the reasons for children being affected by mental disorders is their interaction with their parents, especially with diseased parents (
49,
50). In addition, there seems to be a significant and inverse relationship between parents’ spiritual health and children’s social phobia: by increasing parents’ spiritual Health, social phobia in children decreases. In a study done in Germany on people aged 18 - 60 with the aim of inability and quality of pure life with social phobia, it was found that social phobia in adults leads to mental suffering and has a negative impact on work as well as individual performance. In other words, the quality of life of people with social phobia is at a lower level than those without this disorder (
51). However, this study focusses only on the general dimension of lifestyle and social phobia disorder. The data from this study provides a basis that can be useful for the country’s ongoing services.
This study has the following strengths: To the best of our knowledge, no previous study has examined the association between different aspects of parents’ lifestyle on their children’s mental disorders. Also, we included respondents from city and countryside: This helped us obtain generalizable findings. However, one of the limitations of our study is that because of lack of information, mental disorders were not assessed in parents. The honesty of respondents to the questionnaires cannot be determined. Similarly, their prejudices may have determined their responses to the diagnosis of these mental disorders. However, these problems are inevitable in such studies. Also, the high number of questions in both questionnaires may reduce the willingness of the subjects to respond, which may lead to the possibility of subjects leaving the study due to incomplete information.
4.1. Conclusion
This study approved results of previous studies, i.e. that parents’ lifestyle is an important determinant in children’s mental health. According to our results, the risk of mental disorders in children whose parents have a lower lifestyle score in some dimensions such as mental health and spiritual is higher than others. Therefore, it can be inferred that some aspects of parents’ lifestyle may reflect the status of mental health in their children.