Fig. 3
Subgroup analyses of luteolin intake with cardiac mortality among patients with type 2 diabetes mellitus
HR (95% CI) was assessed by Cox proportional hazards model. The model was adjusted for covariates including age, race, gender, body mass index, income-poverty ratio, smoking, drinking, energy intake, physical activity, hypertension, hyperlipidemia, HbA1c level, and use of oral anti-diabetic agents or insulin (except the stratified variable itself). Due to not being informed of their diabetes, 833 patients were unable to determine the diabetes duration and were excluded from the stratified analysis of type 2 DM duration
1 The interaction between luteolin intake (continuous) and the stratified variable was assessed by the Wald test
*P < 0.05