Henriksson et al. (2005) states statistically that the stressors are of one-half related to parental issues and one-third in peer issues.One hypothesis about Adjustment disorder is that it may represent a sub-threshold clinical syndrome. Subtypes and Their Symptoms
Adjustment disorder has six different subtypes, and they are all based on what the main symptoms are.Those subtypes are as follows:
With depressed mood: depression, hopelessness, lack of interest or joy from previously enjoyed hobbies, tearfulness
With anxiety: anxiousness, being overwhelmed, trouble concentrating, worry, separation anxiety (common in children)
With anxiety and depressed mood: combination of symptoms from both subtypes above
With disturbance of conduct: acting destructive, reckless behavior, rebellious
With mixed disturbance of emotions and conduct: combination of symptoms from both subtypes above
Unspecified: symptoms that do not fall into above subtypes; often include physical symptoms and withdrawal from everyday activities

Risk factors
Those exposed to repeated trauma are at greater risk, even if that trauma is in the past. Age can be a factor due to young children having fewer coping resources and because they are less likely to realize the consequences of a potential stressor.A stressor is generally an event of a serious, unusual nature that an individual or group of individuals experience. Adjustment disorders can come from a wide range of stressors that can be traumatic or relatively minor, like the loss of a girlfriend/boyfriend, a poor report card, or moving to a new neighborhood. It is thought that the more often the stressor occurs, the more likely it is to produce Adjustment disorder.
These factors include but are not limited to age, severity of symptoms, type of adjustment disorder, and personal preference.Different ways to help with the disorder include:

Individual Psychotherapy
Family Therapy
Peer Group Therapy
Medication (used only when the symptoms are severe or with a doctors approval)In addition to professional help, parents and caregivers can help their children with their difficulty adjusting by:

offering encouragement to talk about their emotions
offering support and understanding
reassuring the child that their reactions are normal
involving the childs teachers to check on their progress in school
letting the child make simple decisions at home, such as what to eat for dinner or what show to watch on TV
having the child engage in a hobby or activity they enjoy

Criticism
Like many of the items in the DSM, adjustment disorder receives criticism from a minority of the professional community as well as those in semi-related professions outside the healthcare field. First, there has been criticism of its classification. It has been criticized for its lack of specificity of symptoms, behavioral parameters, and close links with environmental factors. Relatively little research has been done on this condition.An editorial in the British Journal of Psychiatry described adjustment disorder as being so "vague and all-encompassing… as to be useless," but it has been retained in the DSM-5 because of the belief that it serves a useful clinical purpose for clinicians seeking a temporary, mild, non-stigmatizing label, particularly for patients who need a diagnosis for insurance coverage of therapy.In the US military there has been concern about its diagnosis in active duty military personnel.