Table 2

Cigarette and e-cigarette use status, frequency, and quantity at wave 1 and wave 2

VariablesWave 1
N (%)
Wave 2
N (%)
P value
E-liquid price per 60 mL, mean (SD)IDR: 137 839 (112 833)IDR: 144 224 (94 417) 0.02
Recall seeing tax stamp on most recent purchase
 No786 (77.5)267 (26.2) <0.001
 Yes228 (22.5)752 (73.8)
E-cigarette use status
 None*38 (3.7) <0.001
 Non-daily250 (24.1)339 (32.7)
 Daily789 (75.9)660 (63.6)
Number of past 7 days used e-cigarettes, mean (SD)5.7 (1.9)5.2 (2.3) <0.001
Cigarette use status
 None—completely quit smoking213 (20.5)249 (24.1) <0.001
 Non-daily532 (51.2)537 (51.9)
 Daily294 (28.3)248 (24.0)
Cigarettes per week (all smokers), mean (SD)34.2 (54.7)25.6 (38.1) <0.001
  • Boldface denotes statistical significance p<0.05.

  • *Participants who did not use e-cigarettes daily or non-daily at wave 1 were not eligible for participation.

  • IDR, Indonesian rupiah.