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Table 1 Descriptive statistics for the Fagerström Test for Nicotine Dependence (FTND)

From: Managing missing items in the Fagerström Test for Nicotine Dependence: a simulation study

FTND item number

Question with answer scoring

Missing

N (%)

Mean (SD)

Spearman rank correlation of item with total of remaining items

1

How soon after you wake up do you smoke or use tobacco?

0 = after 60 min.

1 = 31-60 min.

2 = 6-30 min.

3 = within 5 min.

269 (0.7%)

2.0 (1.0)

0.48

2

Do you find it difficult to refrain from smoking in forbidden places (e.g., church, library, cinema)?

0 = No

1 = Yes

378 (1.0%)

0.3 (0.4)

0.26

3

Which cigarette would you hate to give up?

0 = any other time

1 = first in the morning

386 (1.0%)

0.6 (0.5)

0.35

4

How many cigarettes per day do you smoke?

0 = 10 or less

1 = 11-20

2 = 21-30

3 = 31+

159 (0.4%)

0.9 (0.8)

0.36

5

Do you smoke more frequently during the first hours after waking than during the rest of the day?

0 = No

1 = Yes

402 (1.0%)

0.4 (0.5)

0.31

6

Do you smoke if you are so ill that you are in bed most of the day?

0 = No

1 = Yes

388 (1.0%)

0.5 (0.5)

0.31

Total FTND score

Possible range: 0-10. Higher scores indicate higher nicotine dependence:

0-2 Very low

3-4 Low

5 Medium

6-7 High

8-10 Very high

408 (1.1%)

4.7 (2.3)

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  1. Descriptive statistics for the Fagerström Test for Nicotine Dependence (FTND) for the 38,742 clients enrolled in Arizona Smoker’s Helpline (ASHLine) from January 3, 2011 to June 23, 2016 and who answered at least one FTND question. FTND Fagerström Test for Nicotine Dependence, ASHLine Arizona Smoker’s Helpline, min. minutes, SD standard deviation