Tailored text-messaging versus standard Quitline telephone counselling for smoking cessation among people who smoke from a low-socio-economic status background in Australia: A study protocol for a non-inferiority randomized controlled trial (The Quit By Phone Study).

Should the tailored text-message support prove non-inferior and more cost-effective than Quitline for this population, this will provide an opportunity for the upscaling of an effective, inexpensive and tailored quit support service. The trial findings will inform cessation treatment policy for priority populations in Australia and globally.