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Table 4 Time since first e-cigarette purchase, stratified by Tobacco Use Pathway (TUP) group

From: Changing patterns of first e-cigarette flavor used and current flavors used by 20,836 adult frequent e-cigarette users in the USA

TUP group Time since first e-cigarette purchase
≥ 5 years 3–5 years 1–3 years < 12 months Total
N (%) N (%) N (%) N (%) N
Switchers 2576 (16.3) 5567 (35.3) 5230 (33.1) 2406 (15.2) 15,779
Dual users 142 (10.7) 334 (25.1) 483 (36.3) 370 (27.8) 1329
Former smoker e-cigarette users 281 (11.3) 788 (31.8) 901 (36.3) 510 (20.6) 2480
Never smoker e-cigarette users 55 (5.2) 225 (21.4) 405 (38.4) 368 (34.9) 1053
  1. Time since first e-cigarette purchase recorded in June 2016