The community health nurse recognizes that which of the following mental health issues is most prevalent in the homeless population?

Choice A rationale:

Bipolar disorder is a mood disorder characterized by alternating periods of depression and mania. While mental health issues can certainly be prevalent among the homeless population, bipolar disorder may not be the most prevalent in this context. Homelessness often exposes individuals to harsh living conditions, which might contribute to mood disturbances, but substance addiction is more commonly associated with this population.

Choice B rationale:

Depression is a significant concern among homeless individuals due to the many challenges they face, but substance addiction is generally more prevalent. Substance abuse often becomes a coping mechanism for dealing with the stressors of homelessness, making it a primary concern in this population.

Choice C rationale:

Substance addiction is a critical mental health issue that is highly prevalent among homeless individuals. The stress, trauma, and lack of stable support systems experienced by the homeless population contribute to a higher risk of substance abuse as a way to cope with their circumstances.

Choice D rationale:

Schizophrenia involves a disconnection from reality, including symptoms like hallucinations and delusions. While schizophrenia can certainly affect homeless individuals, substance addiction remains a more widespread concern due to its association with the challenges of homelessness.

The correct answer is Choice D

Choice A rationale: Metrorrhagia, or irregular uterine bleeding, is not typically associated with anorexia nervosa. Instead, amenorrhea is more common due to hypothalamic suppression from low body fat and caloric intake. The hypothalamus reduces gonadotropin-releasing hormone (GnRH), leading to decreased luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which suppresses ovulation and menstruation. Estrogen levels fall below normal (typically 30–400 pg/mL), disrupting endometrial stability. Thus, bleeding is less likely than complete menstrual cessation.

Choice B rationale: Tachycardia is not expected in anorexia nervosa; bradycardia is more common due to metabolic adaptation and reduced cardiac workload. The body conserves energy by lowering heart rate, often below 60 bpm. Malnutrition leads to decreased thyroid hormone (T3), reduced sympathetic tone, and myocardial atrophy. Electrolyte imbalances and hypovolemia further depress cardiac output. Tachycardia may occur in refeeding syndrome or acute stress, but chronically, the heart rate is typically slow due to adaptive mechanisms.

Choice C rationale: Hyperkalemia is rare in anorexia nervosa; hypokalemia is far more common due to purging behaviors, vomiting, and diuretic or laxative abuse. Potassium levels often fall below the normal range of 3.5–5.0 mEq/L. Losses through the gastrointestinal tract and renal excretion lead to muscle weakness, arrhythmias, and fatigue. Intracellular shifts during starvation also contribute to low serum potassium. Hyperkalemia may occur transiently during tissue breakdown or renal failure but is not a hallmark finding.

Choice D rationale: Constipation is a frequent finding in anorexia nervosa due to decreased caloric intake, slowed gastrointestinal motility, and reduced fiber consumption. Starvation suppresses parasympathetic activity, leading to delayed colonic transit. Electrolyte imbalances, especially hypokalemia, further impair smooth muscle contraction. Normal bowel frequency ranges from three times per week to three times per day; anorexic clients often fall below this due to systemic hypometabolism. Constipation may also be exacerbated by dehydration and laxative dependence.