Biostatistics & Study Design USMLE Step 1 Practice Questions
64 board-style USMLE Step 1 questions in Biostatistics & Behavioral Science. Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- USMLE Step 1 · medium49. A health system evaluates whether a text message reminder program reduces missed insulin follow-up visits among adults with type 2 diabetes (mean age 58 years). The intervention…
- USMLE Step 1 · easy50. A 45-year-old woman with chronic migraines (BP 128/82, HR 82, previously on topiramate) enrolls in a crossover trial comparing two prophylactic medications. After completing the…
- USMLE Step 1 · medium51. A randomized controlled trial evaluating a new antihypertensive medication requires all participants to complete a 2-week placebo run-in phase before randomization. Patients pre…
- USMLE Step 1 · easy52. A 63-year-old man with acute ST-elevation myocardial infarction (BP 128/82, HR 102, RR 18, SpO2 98%) presents with elevated troponin I (2.8 ng/mL) and anterior wall changes on E…
- USMLE Step 1 · easy53. A multicenter trial enrolls patients with acute decompensated heart failure in waves of 4 at each site. Within each group of 4, exactly 2 patients are assigned to the new diuret…
- USMLE Step 1 · hard54. A 61 year old woman with chronic obstructive pulmonary disease enrolls in a cohort study of coffee intake and lung cancer. Investigators adjust for smoking status as current, fo…
- USMLE Step 1 · hard55. A 48 year old man with alcohol use disorder is admitted for pancreatitis. Researchers study only hospitalized patients and find that among admitted patients, obesity appears neg…
- USMLE Step 1 · medium56. A 67 year old man from a state with high per capita red wine consumption has a myocardial infarction. A researcher argues that this individual probably had a low cardiovascular…
- USMLE Step 1 · easy57. A 62 year old man with severe aortic stenosis is considering transcatheter valve replacement. A cost utility study estimates that the procedure would give him 4 additional years…
- USMLE Step 1 · easy58. A 41 year old man with long standing intravenous drug use dies of infective endocarditis. In the same city, an 84 year old woman dies of heart failure. Public health officials e…
- USMLE Step 1 · easy59. A 27-year-old nulliparous woman presents for contraception counseling. Vital signs are stable (BP 118/76, HR 72, RR 14, Temp 37°C). She takes no medications and denies contraind…
- USMLE Step 1 · easy60. A term male infant is born after an uncomplicated pregnancy but dies from neonatal sepsis on day 12 of life. County records show 12 infant deaths before age 1 year and 3,000 liv…
- USMLE Step 1 · easy61. A 29-year-old woman presents with severe vaginal bleeding and hypotension (BP 80/50, HR 120, RR 22) two days after vaginal delivery of her second child. Despite aggressive fluid…
- USMLE Step 1 · medium62. A 34 year old man who survived childhood Hodgkin lymphoma is followed in a survivorship clinic. Investigators study 2,000 adults who received mantle radiation as children and ob…
- USMLE Step 1 · medium63. A 46 year old woman presents with progressive exertional dyspnea, lower extremity edema, and abdominal distention. Her pretest probability of pulmonary hypertension is estimated…
- USMLE Step 1 · easy64. A 58 year old man comes to clinic for evaluation of intermittent hematochezia and a 4 kg unintentional weight loss. Before ordering colonoscopy, investigators studying a fecal i…