Table 2

Summary statistics (mean±SD) for each venue/room category

N	Venue type	Room measured	Mean volume (m³)	Mean active smoker density^*	Mean PM_2.5 (µg/m³)	Median PM_2.5
6	Waterpipe café^†	Smoking	288±93	3.55±1.89	384±279	345
11	Waterpipe café	Smoking	288±278	4.32±3.87	369±520	124
11	Waterpipe café	Non-smoking	252±223	0.21±0.70	123±236	44
5	Cigarette	Smoking	335±194	0.84±0.79	119±95	89
5	Cigarette	Non-smoking	405±241	0.00±0.00	26±31	9
5	Smoke-free	Non-smoking	666±442	0.00±0.00	9±2	8

↵* Burning cigarettes–waterpipes per 100 m³.
↵† Venue locations did not have a visible non-smoking room (ie, smoking throughout).