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Table 3 Use of other nicotine-containing substances a and ND according to e-liquid. NDIT Study 2017–20

From: Type of e-liquid vaped, poly-nicotine use and nicotine dependence symptoms in young adult e-cigarette users: a descriptive study

E-liquid

n

Used ≥1 other nicotine-containing substancea in past year

%

No. other nicotine-containing substances in past yeara mean (sd)

Used conventional cigarettes in past year

%

Perceived nicotine dependence

%

Craving

%

Withdrawal symptomsb

%

Total

149

82.6

1.6 (1.0)

72.5

60.8

57.8

58.1

One e-liquid

95

75.8

1.3 (1.0)

64.2

54.3

52.7

56.6

 With nicotine only

35

91.4

1.5 (0.9)

88.6

79.4

82.4

74.3

 Without nicotine only

13

76.9

1.2 (1.0)

53.8

30.8

25.0

25.0

 For cannabis only

47

63.8

1.3 (1.1)

48.9

42.6

38.3

47.5

Two e-liquids

41

95.1

1.9 (0.8)

87.8

68.3

65.9

60.0

 With and without nicotine

19

100.0

1.9 (0.7)

94.7

84.2

78.9

84.2

 With nicotine and for cannabis

8

100.0

2.0 (0.9)

100.0

87.5

87.5

62.5

 Without nicotine and for cannabis

14

85.7

1.7 (1.0)

71.4

35.7

35.7

23.1

Three e-liquids

13

92.3

2.2 (0.9)

84.6

84.6

69.2

61.5

  1. aIncludes conventional cigarettes, other tobacco products (cigarillos, cigars, pipes, bidis, chewing tobacco, snuff, waterpipe) and cannabis mixed with tobacco
  2. b11 participants who had never smoked cigarettes (verified in data collection cycles 1–22) were excluded