Table 1.

Call Center Reports.

Study Author(s)	Number of Exposures	Period Observed	Data Source	Most Frequent Age Group	Effects
Chatham-Stephens et al2	2405 total exposures	September 2010 through February 2014	US poison centers	E-cigarette exposures were mostly in persons aged 0-5 years (51.1%) and >20 years (42.0%). Cigarette exposures were primarily in persons aged 0-5 years (94.9%)	The most common adverse health effects in e-cigarette exposure calls were vomiting, nausea, and eye irritation. One suicide death from intravenous injection of nicotine liquid was reported
Vakkalanka et al3	1700 total exposures	June 2010 through September 2013	US poison centers	The most frequent age groups were children ≤5 years with 717 (42.2%) exposures and adults aged 20-39 years with 466 (27.4%) exposures	The majority of patients who were followed reported that they had only minor effects
Cantrell5	35 total exposures	2010 through 2012	California poison centers	Age range 8 months to 60 years	Reported symptoms were mild and transient. Five patients were evaluated in an emergency department but none admitted
Ordonez et al6	225 total exposures	January 2009 through February 2014	Texas poison centers	53% (n = 119) occurred in individuals aged <5 years old, 41% (n = 93) occurred in individuals aged >20 years old, and 6% (n = 13) occurred in individuals aged 6-19 years	The clinical effects reported most often were vomiting (20%), nausea (10%), headache (4%), ocular irritation (5%), dizziness (5%), and lethargy (2%)
Kamboj et al4	4138 exposures in children <6 years old	January 2012 to April 2015	US poison centers	44.1 % children <2 years old