A nurse is caring for a client who has a new diagnosis of urolithiasis. Which of the following should the nurse identify as an associated risk factor?

Choice A rationale Chronic diuretic use, particularly thiazide diuretics, can lead to hypercalcemia and increased calcium concentration in the urine, making it a risk factor for calcium stone formation, the most common type of urolithiasis, so this is a potential risk factor, not an inappropriate identification. Choice B rationale A strong family history is a significant non-modifiable risk factor for urolithiasis, suggesting a genetic predisposition for metabolic defects that lead to stone formation or anatomical variations in the renal system. Clients with a first-degree relative who has had stones have a higher likelihood of developing them. Choice C rationale A body mass index (BMI) greater than 25, indicating overweight or obesity, is associated with an increased risk of kidney stone formation, particularly uric acid stones, due to changes in urinary pH and excretion. A BMI less than 25 (normal or underweight) is not typically considered an associated risk factor. Choice D rationale Hypercalcemia, or elevated calcium levels in the blood, is a major risk factor for calcium oxalate stones, the most common type of kidney stone. Hypocalcemia, a low calcium level, is typically a protective factor against calcium stone formation, although it may be seen as a result of certain diseases.