A 52-year-old man from urban Delhi is screened for diabetes during a health camp. He is overweight (BMI 28 kg/m²), sedentary, and has a family history of diabetes in his mother and brother. His fasting blood glucose is 118 mg/dL and HbA1c is 5.9%. Which epidemiological feature best distinguishes him from a 28-year-old woman presenting with acute-onset polyuria, polydipsia, and weight loss over 2 weeks?