Question

What are the odds of non smokers developing cardiovascular disease when compared to smokers

Answer 1

The odds of non-smokers are lower then smokers.

Answer 2

What are the odds of non smokers developing cardiovascular disease when compared to smokers ?

Less risk of developing cardiovascular disease unless "nonsmokers" are passive smokers.
Inhalation by the non-smokers toxic products (carbon monoxide, tar particles, nicotine ...) present in tobacco smoke include, at significant levels in the urine, these substances responsible for the occurrence of cancer , cardiovascular diseases and respiratory diseases.
  the smoke cleared at the extremity of a cigarette is actually more toxic than the smoke inhaled by the smoker.
As such, the tobacco smoke exposure is a major risk for both smokers and non smokers.