Table 1.

Transition to the higher BMI group over 3 months and 1-year incidence of high-risk conditions for COVID-19^b.

BMI group	Transition to the higher BMI groupa within 3 months vs no transition (odds ratio) (95% CI)	1-year risk for high-risk conditions for COVID-19 ⴕ (%, 95% CI)
		No individuals transition to the higher BMI group	All individuals transition to the higher BMI group
Normal weight N = 85,159	1.07 (0.78–1.48)	0.64 (0.58–0.69)	0.68 (0.48–0.90)
Overweight N = 81,066	1.44 (1.16–1.80)	1.65 (1.56–1.75)	2.35 (1.88–2.80)
Obese N = 87,534	1.50 (1.06–2.13)	2.39 (2.28–2.50)	3.52 (2.39–4.66)

BMI, body mass index; COVID-19, coronavirus disease 2019; CI, confidence interval.

^aTransition to the higher BMI group: normal weight (BMI: 18.5–24.9 kg/m²) to overweight (BMI: 25.0–29.9 kg/m²), overweight (BMI: 25.0–29.9 kg/m²) to obese (BMI: ≥30 kg/m²) and obese (BMI: 30.0–39.9 kg/m²) to severely obese (BMI: ≥40 kg/m²).

^bIncidence of cardiovascular disease, chronic obstructive pulmonary disease, diabetes and chronic kidney disease in 1 year.