There's plenty of evidence out there that fine particulate has a significant impact on long term health.

You can easily measure the impacts of cooking by buying a particle counter and making some stirfry or burning some cookies in the oven. I have, it's easy to measure PM2.5 air quality in your apartment worse than the worse city in the world after a bit of pan frying which if you don't actively do quite a bit will linger for hours.

You'd have to come up with a model of nitrogen oxides produced by gas stoves and their long term health effects and compare them to fine particles in poorly ventilated / filtered air in homes.