Table 1

Descriptive statistics and PM_2.5 concentration for each venue by smoking status of room measured

Venue ID	Venue type	Smoking			Non-smoking
Venue ID	Venue type	Volume (m³)	Active smoker density^*	Mean PM_2.5 (µg/m³)	Volume (m³)	Active smoker density^*	Mean PM_2.5 (µg/m³)
5	Waterpipe café^†	412	6.15	1733	179	0.00	823
19	Waterpipe café	208	6.09	889	150	0.00	154
16	Waterpipe café	256	6.11	877	NA	NA	NA
10	Waterpipe café	49	7.15	518	99	0.00	34
28	Waterpipe café^†	209	2.28	461	NA	NA	NA
13	Waterpipe café	304	3.87	381	NA	NA	NA
15	Waterpipe café	218	2.75	309	NA	NA	NA
7	Waterpipe café	182	0.73	263	169	0.00	44
8	Waterpipe café	275	5.22	223	NA	NA	NA
4	Waterpipe café	135	4.92	140	111	0.00	31
20	Waterpipe café	99	13.52	124	251	0.00	16
1	Waterpipe café	23	16.07	112	325	0.00	50
21	Waterpipe café	531	1.26	107	480	0.00	55
25	Waterpipe café^†	316	2.95	95	57	2.33	98
6	Waterpipe café	987	1.66	67	819	0.00	20
11	Waterpipe café	464	1.08	53	NA	NA	NA
24	Waterpipe café	223	0.15	13	130	0.00	30
17	Cigarette restaurant	308	1.95	247	826	0.00	9
9	Cigarette restaurant	661	0.91	183	281	0.00	79
14	Cigarette restaurant	253	1.19	89	321	0.00	6
22	Cigarette restaurant	308	0.16	64	373	0.00	6
26	Cigarette restaurant	144	0.00	11	224	0.00	31
2	Smoke-free restaurant	NA	NA	NA	NA	NA	NA
3	Smoke-free restaurant	NA	NA	NA	247	0.00	11
18	Smoke-free restaurant	NA	NA	NA	392	0.00	11
12	Smoke-free restaurant	NA	NA	NA	1127	0.00	8
23	Smoke-free restaurant	NA	NA	NA	1163	0.00	8
27	Smoke-free restaurant	NA	NA	NA	401	0.00	7

↵* Burning cigarettes-waterpipes per 100 m³.
↵† Waterpipe cafés where cigarette smoking was observed.