Considering the patient's current health conditions and medication regimen, which of the following is the most significant risk factor for developing renal complications?
Uncontrolled hypertension with diastolic blood pressure of 98 mmHg Concurrent use of multiple NSAIDs (ibuprofen and naproxen) Viral sinusitis currently managed without antibiotics Body Mass Index (BMI) of 27.3 kg/m2 indicating overweight