Table 4. Summary of multiunit housing (MUH) operators' reports of existing smoke-free building policies, secondhand smoke (SHS) incursions, and support for or interest in smoke-free building policies.

Lead author	Year	Current smoke-free building policy	SHS incursions (perception)	SHS incursions (frequency)	Policy support/interest	Other Assessed indicators
Cramer	2011	16% of respondents reported a smoke-free building policy in all residential units. 10% of reported a partial smoke-free building policy	–	30.2% of those without a building policy reported complaint of SHS incursion and 55.8% reported no compliant of SHS incursion from tenants	37% of those without a building policy asked to be contacted with information on smoke-free MUH	Perceived barriers to policy implementation; perceived and actual motivators for policy implementation
Jackson	2011	9% of properties had smoke-free building policy in residential units and 34% had a building policy in at least one of the following: interior common areas, residential units and exterior common areas	53% of property managers reported that SHS could drift from one unit to another. 26% believed that exposure to SHS was a significant issue for residents	–	94% of those without a building policy were not considering one. 5% of those without a building policy were considering implementing one	Compliance; enforcement; perceived barriers for policy implementation; perceived motivators for policy implementation
Hewett	2007	20 operators had designated one or more buildings smoke-free; 14 had designated unsubsidised buildings smoke-free and 7 had designated government subsidised buildings smoke-free	27% identified tobacco smoke as the most common source of objectionable air moving between apartments. 17% of those without a policy saw SHS transfer as a major health issue for residents compared with 55% of those with a policy	4% said SHS incursion occurs on a regular or recurring basis in most of their buildings, 14% said some do, 33% said few do and 45% said none do	25% of respondents said they would be very interested in learning ways to reduce SHS transfer and 41% said they would be somewhat interested	Perceived barriers for policy implementation; perceived motivators for policy implementation; landlord information needs
King	2010	9% reported no smoking building policies in all living units they owned and 2% reported smoking restrictions in at least one building	–	–	75% of those without a building policy were interested in one; interest was higher among those with government subsidised units	Perceived barriers for policy implementation; perceived motivators for policy implementation
King	2011	14% of MUH operators reported a smoke-free building policy at baseline compared with 19% 1 year later. Exposure to the intervention did not significantly increase the adoption of a smoke-free building policy	–	–	72.3% of those without a building policy expressed interest in implementing at baseline and 77.3% expressed interest at follow-up	Perceived barriers for policy implementation
Pizacani	2011	All 11 building operators had buildings with smoke-free MUH policies in residential units and outdoors spaces	–	–	73% of those with a building policy were in favour of it	Compliance; enforcement