Table 3. Sensitivity analyses of the risk of atrial fibrillation incidence according to the metabolic status and body mass index categories.

	Metabolically healthy			Metabolically unhealthy
		Optimal	Abdominal obesity		Optimal	Abdominal obesity
Obesity defined by WC		1	1.79 (0.66, 4.86)		2.66 (1.38, 5.15)*	2.19 (1.14, 4.22)*
	Metabolically healthy			Metabolically unhealthy
	UW	NW	OW/OB	UW	NW	OW/OB
Excluding events in the first year	1.43 (0.18, 11.36)	1	1.67 (0.62, 4.50)	0.71 (0.09, 5.64)	2.76 (1.35, 5.61)*	2.33 (1.14, 4.74)*
Re-definition of metabolically healthy	1.33 (0.17, 10.46)	1	1.64 (0.62, 4.33)	0.47 (0.06, 3.70)	2.12 (1.07, 4.18)*	1.88 (0.95, 3.70)

Notes:

Adjusted by model three, presented with hazard ratio with 95% confidence interval. *Data are statistically significant (p < 0.05).

Model 3: adjusted for gender, age, smoker, alcohol, marital status, education, income.

Optimal waist circumference: <80 cm in women and <90 cm in men; abdominal obesity, ≥80 cm in women and ≥90 cm in men; Underweight, <18.5 kg/m²; Normal weight, 18.5 to 23.9 kg/m²; Overweight, 24.0 to 26.9 kg/m²; obese, ≥27.0 kg/m².

Re-definition of metabolically healthy: Exclusion with abnormal metabolic profiles in the TwSHHH survey or with at least twice the diagnosis of International Classification of Diseases-9^th revision codes of diabetes, hypertension, and hyperlipidemia in the outpatient clinic or the inpatient admission record.

Abbreviations: UW, underweight; NW, normal weight; OW, overweight; OB, obesity; WC, Waist circumference. TwSHHH, Taiwan’s Hypertensive, Hyperglycemia, Hyperlipidemia Survey.