Osteoporosis is managed almost entirely in primary care, and the questions turn on thresholds: who gets screened and at what age, what a T-score actually means, and when a result crosses from monitoring into treatment. These cover DEXA interpretation, calcium and vitamin D, pharmacologic options, and fall-risk counselling.
Question 1
A 65-year-old female presents for an annual wellness visit. Her baseline T-score of -1.8 was obtained last month, and her FRAX score does not meet the threshold for prescription intervention. She asks when she should have her next bone density test. What is the most appropriate recommendation?
- A) Schedule the next bone density evaluation in one year.
- B) Schedule the next bone density evaluation in ten years.
- C) Schedule the next bone density evaluation in four years.✓
- D) Schedule the next bone density evaluation in seven years.
💡 Key Takeaway
Untreated patients with moderate osteopenia (T-score -1.50 to -1.99) require DEXA monitoring every 3 to 5 years.
Show rationale
This patient has moderate osteopenia and does not currently require pharmacologic treatment based on her FRAX score. For untreated patients with a T-score between -1.50 and -1.99, guidelines recommend a monitoring interval of 3 to 5 years to evaluate the trajectory of bone loss. Option C is correct. Option A is too frequent and is reserved for advanced osteopenia. Options B and D are too infrequent, risking delayed intervention if her bone density rapidly declines.
Question 2
A 66-year-old female presents to review her initial DEXA scan results. She has no history of systemic steroid use, malabsorption, or other chronic illnesses. Her results show a T-score of -2.7 at the femoral neck. Which of the following represents the most accurate diagnostic conclusion?
- A) Primary osteopenia diagnosis
- B) Secondary osteopenia diagnosis
- C) Primary osteoporosis diagnosis✓
- D) Secondary osteoporosis diagnosis
💡 Key Takeaway
A T-score of -2.5 or lower without secondary causes in an older adult indicates primary osteoporosis.
Show rationale
This patient presents with a DEXA T-score of -2.7, which is diagnostic for primary osteoporosis as it falls at or below the -2.5 threshold. Because she is a postmenopausal female with no history of systemic steroid use or other underlying conditions known to cause bone loss, this is classified as a primary condition. Primary osteopenia diagnosis is incorrect because her T-score is significantly lower than the -2.4 cutoff for osteopenia. Secondary osteopenia diagnosis is incorrect due to both the T-score value indicating osteoporosis and the complete absence of secondary contributing factors. Secondary osteoporosis diagnosis is incorrect because there is no evidence of a secondary cause, such as hyperparathyroidism, malabsorption, or chronic glucocorticoid therapy, driving the bone density loss. The diagnosis rests firmly on primary age-related and postmenopausal bone loss.
Question 3
A 66-year-old postmenopausal woman has a DEXA scan showing a T-score of -1.8 at the femoral neck. Her FRAX calculation reveals a hip fracture probability of 3.5%. Which action represents the most appropriate interpretation and subsequent plan?
- A) Advise calcium supplements and repeat DEXA annually.
- B) Recommend weight-bearing exercise and repeat scan annually.
- C) Prescribe hormone replacement therapy for bone protection.
- D) Initiate pharmacologic treatment for high fracture risk.✓
💡 Key Takeaway
Osteopenia requires pharmacologic treatment when the FRAX 10-year probability of a hip fracture is 3% or greater.
Show rationale
This patient has osteopenia based on a T-score between -1.0 and -2.5. However, pharmacologic treatment is definitively indicated because her FRAX 10-year probability for a hip fracture is 3% or greater. Options A and B rely solely on lifestyle modifications and delayed monitoring, which inadequately address her immediate and elevated fracture risk. Option C is incorrect because hormone replacement therapy is not considered first-line for osteoporosis prevention or treatment in a 66-year-old due to associated cardiovascular and oncologic risks.
Question 4
A 74-year-old female who has taken alendronate for seven years reports a two-month history of a dull, aching pain in her right thigh. She denies any recent trauma or changes in her daily physical activity. How should the nurse practitioner proceed?
- A) Discontinue the alendronate and order bilateral femur radiographs.✓
- B) Advise resting the leg and prescribe topical NSAIDs.
- C) Switch the medication to intravenous zoledronic acid therapy.
- D) Recommend physical therapy to strengthen the quadriceps muscles.
💡 Key Takeaway
Long-term bisphosphonate therapy increases the risk of atypical femur fractures presenting initially as dull thigh pain.
Show rationale
Patients on long-term bisphosphonate therapy, typically beyond five years, are at increased risk for atypical femur fractures. The classic prodromal symptom is a dull, aching pain in the thigh or groin region. The nurse practitioner must immediately discontinue the bisphosphonate and order bilateral femur radiographs to evaluate for cortical thickening or an impending stress fracture. Advising rest with topical NSAIDs or recommending physical therapy ignores the severe underlying risk of a complete fracture. Switching to intravenous zoledronic acid is inappropriate because it belongs to the same drug class and carries the exact same risk.
Question 5
A 60-year-old female is prescribed oral alendronate for osteoporosis. She has a history of Roux-en-Y gastric bypass surgery and currently exhibits a serum calcium level of 7.9 mg/dL. Which action should the nurse practitioner take regarding her treatment?
- A) Withhold the medication and correct the underlying calcium deficit.✓
- B) Prescribe the medication to be taken with dairy products.
- C) Change the medication to an intravenous bisphosphonate formulation instead.
- D) Advise taking the medication immediately before going to sleep.
💡 Key Takeaway
Pre-existing hypocalcemia must be fully corrected before initiating any bisphosphonate therapy to prevent severe metabolic complications.
Show rationale
Bisphosphonates strongly inhibit osteoclast-mediated bone resorption, which can rapidly precipitate severe, life-threatening hypocalcemia if a patient already has a low baseline serum calcium. Because this patient has a serum calcium level of 7.9 mg/dL, likely exacerbated by malabsorption from her gastric bypass surgery, the nurse practitioner must withhold the medication and aggressively correct the calcium deficit first. Changing to an intravenous formulation does not resolve the hypocalcemia and could actually worsen it. Prescribing the medication with dairy products or before sleep violates strict administration guidelines, as oral bisphosphonates require an empty stomach and upright posture.
Question 6
A 62-year-old male with Stage 4 CKD presents with fatigue and bone pain. Labs show an eGFR 22 mL/min/1.73 m2, calcium 7.8 mg/dL, and phosphorus 6.5 mg/dL. What is the primary pathophysiologic mechanism driving this patient's current laboratory abnormalities?
- A) Decreased renal synthesis of 1,25-dihydroxyvitamin D✓
- B) Increased renal tubular reabsorption of serum phosphate
- C) Decreased parathyroid hormone gland systemic secretion
- D) Increased intestinal absorption of dietary serum calcium
💡 Key Takeaway
CKD progression reduces active vitamin D synthesis, causing hypocalcemia and secondary hyperparathyroidism.
Show rationale
In Stage 4 CKD, the failing kidneys lose the ability to convert 25-hydroxyvitamin D to its active form, 1,25-dihydroxyvitamin D. This deficiency leads to decreased intestinal calcium absorption, causing hypocalcemia. The hypocalcemia, combined with hyperphosphatemia from decreased renal phosphate excretion, stimulates the parathyroid glands, leading to secondary hyperparathyroidism. Option A correctly identifies this pathogenesis. Option B is incorrect because CKD causes decreased, not increased, phosphate excretion, resulting in retention. Option C is incorrect because parathyroid hormone secretion increases in response to low calcium and high phosphorus. Option D is incorrect because intestinal calcium absorption decreases due to the lack of active vitamin D.
Question 7
An 84-year-old homebound female reports two falls in the past year and has inadequate dietary intake. Her serum 25-hydroxyvitamin D level is 14 ng/mL.
- A) Prescribe a daily oral calcium supplement.
- B) Recommend daily outdoor sunlight exposure therapy.
- C) Order an urgent bone mineral density scan.
- D) Initiate high-dose oral vitamin D supplementation.✓
💡 Key Takeaway
Correcting severe vitamin D deficiency in frail older adults improves muscle strength and reduces fall risk.
Show rationale
Frail older adults with a history of falls and inadequate nutrition are at high risk for severe vitamin D deficiency, which directly contributes to proximal muscle weakness and impaired balance. Initiating high-dose oral vitamin D supplementation is the most appropriate evidence-based intervention to correct her low level of 14 ng/mL and reduce her subsequent fall risk. Prescribing a daily oral calcium supplement alone is insufficient because it does not correct the underlying vitamin D deficit required for optimal muscle function and calcium absorption. Recommending daily outdoor sunlight exposure therapy is highly impractical and unreliable for a frail, homebound elderly patient. Ordering an urgent bone mineral density scan provides diagnostic information about osteoporosis but does not serve as an immediate, active intervention to prevent future falls.
Question 8
An 80-year-old with chronic shoulder osteoarthritis presents for evaluation after receiving an intra-articular corticosteroid injection four weeks ago. The patient's PEG scale score decreased from 8/10 to 4/10 over this period.
- A) Schedule a repeat corticosteroid injection to eliminate remaining pain.
- B) Order a magnetic resonance imaging scan to assess joint damage.
- C) Prescribe a short course of oral corticosteroids for inflammation.
- D) Encourage continuation of home range of motion exercise routines.✓
💡 Key Takeaway
A clinically meaningful decrease in the PEG scale indicates an effective pain plan.
Show rationale
The PEG scale assesses pain intensity, interference with enjoyment of life, and interference with general activity. A PEG score reduction of 30 percent or more indicates clinically meaningful functional status improvement. Since the plan is highly effective, conservative management should continue. Option D is correct because maintaining joint mobility through home exercises supports continued functional gains without added risks. Option A is incorrect because repeating a corticosteroid injection at four weeks is contraindicated due to the risk of cartilage degradation; injections are typically spaced at least three months apart. Option B is incorrect because imaging is unnecessary when the patient responds well to current therapy. Option C is incorrect because systemic corticosteroids carry high risks for older adults, including hyperglycemia and osteoporosis, and are not indicated here.
Question 9
A 72-year-old male undergoes routine bone density screening. His DEXA scan shows a T-score of -2.2 at the total hip. A subsequent calculation reveals a FRAX 10-year hip fracture risk of 3.5%. Which of the following best categorizes this patient's skeletal health status?
- A) Osteopenia with elevated fracture risk✓
- B) Osteoporosis with elevated fracture risk
- C) Osteopenia with baseline fracture risk
- D) Osteoporosis with baseline fracture risk
💡 Key Takeaway
Osteopenia with a FRAX hip fracture risk over 3% indicates elevated risk requiring pharmacologic intervention.
Show rationale
The patient has a T-score of -2.2, which falls strictly into the osteopenia range (-1.0 to -2.4). However, his FRAX 10-year hip fracture risk is 3.5%, which exceeds the 3% threshold indicating an elevated risk that warrants pharmacologic treatment. Osteoporosis with elevated fracture risk is incorrect because the T-score is not -2.5 or lower, and there is no history of a fragility fracture to support a clinical osteoporosis diagnosis. Osteopenia with baseline fracture risk is incorrect because the FRAX score explicitly demonstrates a high risk requiring intervention rather than routine monitoring alone. Osteoporosis with baseline fracture risk is doubly incorrect as it misidentifies both the diagnostic category and the clinical risk level. The correct diagnosis remains osteopenia, but it is complicated by an elevated fracture risk requiring active management.
Question 10
A 68-year-old female has been taking weekly alendronate for three months. She reports worsening heartburn and mentions she has been taking the pill with morning coffee to remember it. Which of the following is the best action?
- A) Switch to a monthly oral ibandronate dose.
- B) Prescribe a daily proton pump inhibitor trial.
- C) Change the prescription to oral risedronate daily.
- D) Advise taking the medication with plain water.✓
💡 Key Takeaway
Oral bisphosphonates must be taken with plain water on an empty stomach to ensure absorption and prevent irritation.
Show rationale
Bisphosphonates like alendronate are poorly absorbed and highly irritating to the gastrointestinal mucosa. They must be taken on an empty stomach with a full glass of plain water to ensure adequate absorption and prevent esophageal injury. Taking the medication with morning coffee significantly reduces its bioavailability and likely contributes to her worsening heartburn. Advising her to use plain water directly corrects the administration error. Switching to monthly ibandronate or daily risedronate does not resolve the underlying issue, as all oral bisphosphonates require the same strict administration parameters to prevent mucosal injury. Prescribing a proton pump inhibitor is a near-miss distractor; while it might treat the heartburn symptomatically, it fails to address the root cause of the problem, which is the incorrect administration technique reducing drug efficacy and causing localized irritation.
