Comparison of Urinary Cotinine (ng/mL) Concentrations Among Adolescents and Young Adults (n = 517), Ages 12–21, Who Were Seen in Stony Brook Children’s Clinics Between April 2017 and April 2018 Who Reported Past-Week Use of Nicotine-Containing Products
| . | Mean . | SD . | Median . | IQR . |
|---|---|---|---|---|
| Only tobacco (n = 6) | 330.30 | 517.84 | 99.97 | 661.63 |
| Only e-cigarette (n = 51) | 189.72 | 472.49 | 3.56 | 40.2 |
| Dual users (tobacco and e-cigarette) (n = 9) | 524.77 | 708.45 | 267.55 | 940.91 |
| Pod users (n = 19) | 598.68 | 739.58 | 259.03 | 1267.69 |
| Tobacco alone and marijuana (n = 3) | 638.77 | 619.59 | 442.92 | 1191.85 |
| E-cigarette alone and marijuana (n = 24) | 329.67 | 651.69 | 7.6 | 286.27 |
| Dual users and marijuana (n = 6) | 448.73 | 592.75 | 297.61 | 1614.559 |
| . | Mean . | SD . | Median . | IQR . |
|---|---|---|---|---|
| Only tobacco (n = 6) | 330.30 | 517.84 | 99.97 | 661.63 |
| Only e-cigarette (n = 51) | 189.72 | 472.49 | 3.56 | 40.2 |
| Dual users (tobacco and e-cigarette) (n = 9) | 524.77 | 708.45 | 267.55 | 940.91 |
| Pod users (n = 19) | 598.68 | 739.58 | 259.03 | 1267.69 |
| Tobacco alone and marijuana (n = 3) | 638.77 | 619.59 | 442.92 | 1191.85 |
| E-cigarette alone and marijuana (n = 24) | 329.67 | 651.69 | 7.6 | 286.27 |
| Dual users and marijuana (n = 6) | 448.73 | 592.75 | 297.61 | 1614.559 |