WPT (g) | WPT loaded in WP head presmoking* | WPT consumed | Smoked WPT residue† |
Mean (±SD) | 10 | 2.99 (±0.93) | 7.01 (±0.93) |
Median (5–95 percentile) | 3.00 (1.5–4.7) | 7.00 (5.3–8.5) | |
(Minimum–maximum) | (0.5-5.2) | (4.8–9.5) | |
WP w ater (mL) | Water placed in WP bowl pre smoking‡ | WP water loss | Smoked WP wate r§ |
Mean (±SD) | 470 | 26.3 (±24.50) | 443 (±24.50) |
Median (5–95 percentile) | 20.0 (0–70) | 450 (400–470) | |
(Minimum–maximum) | (0–165) | (305–470) | |
Length of time smoked WPT per session (min ) | |||
Mean (±SD) | 33.1 (±9.35) | ||
Median (5–95 percentile) | 30.0 (25–54) | ||
(Minimum–maximum) | (21–64) | ||
Location of WPT smoking in homes | |||
Indoors¶ n (%) | 28 (56) | ||
Outdoors** n (%) | 22 (44) |
*Research Assistants weighted 10 g WPT using an analytical balance and loaded it in the WP head.
†Smoked WPT residue=WPT remaining at end of a smoking session.
‡Research Assistants measured 470 mL of water and placed it in the WP bowl.
§Smoked WP water = Water remaining in WP bowl at end of a smoking session.
¶Indoors = Participants smoked in the living room, kitchen, or bedroom.
**Outdoors = Participants smoked in the backyard, on the patio, or balcony.
n, number of participants; WP, waterpipe; WPT, waterpipe tobacco.