After adjustment for age and sex , chronic heart disease was associated with an increased risk of hospitalization with H7N9
( relative risk , 9.68 ; 95 % confidence interval , 5.24 - 17.9 ) .
After adjustment for age and sex , chronic heart disease was associated with an increased risk of hospitalization with H7N9 ( relative risk , 9.68 ; 95 % confidence interval , 5.24 - 17.9 ) .
After adjustment for age and sex , chronic heart disease was associated with an increased risk of hospitalization with H7N9 ( relative risk , 9.68 ; 95 % confidence interval , 5.24 - 17.9 ) .