Table 2 Hazard ratios for developing laryngeal cancer according to BMI
| Â | IR (per 1000 person-years) | HR (95% CI) | ||
|---|---|---|---|---|
Model 1 | Model 2 | Model 3 | ||
Underweight | ||||
  < 18.5 | 0.052 | 1.59 (1.35–1.87) | 1.36 (1.16–1.60) | 1.43 (1.22–1.69) |
  ≥ 18.5 | 0.042 | 1 (Reference) | 1 (Reference) | 1 (Reference) |
BMI, kg/m2 | ||||
  < 18.5 | 0.052 | 1.35 (1.14–1.59) | 1.23 (1.04–1.45) | 1.25 (1.06–1.48) |
 18.5–22.9 | 0.045 | 1 (Reference) | 1 (Reference) | 1 (Reference) |
 23–24.9 | 0.045 | 0.81 (0.74–0.88) | 0.87 (0.80–0.94) | 0.84 (0.78–0.92) |
 25–29.9 | 0.039 | 0.71 (0.65–0.77) | 0.78 (0.72–0.85) | 0.74 (0.68–0.81) |
  ≥ 30 | 0.026 | 0.77 (0.61–0.96) | 0.83 (0.66–1.05) | 0.76 (0.60–0.96) |