Table 1– Pre-defined categories for matching cases and controls 1:1
CategorySexAge yrsBMI kg·m-2
1Female18–3015.0–20.0
2Male31–4020.1–25.0
341–5025.1–29.0
451–6029.1–35.0
561–7035.1–50.0
671–80
  • BMI: body mass index.