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Table 1 Descriptive statistics - continuous variables

From: A survey study of the association between mobile phone use and daytime sleepiness in California high school students

 

n

Age (years)

# calls/d

# texts/d

# calls or texts/d

ESS

All

202

16 ± 1.2

2 (0–60)

22.5 (0–700)

26 (0–702)

6.8 ± 3.5

Male

64

16 ± 1.2

2 (0–40)

10 (0–300)

12 (0–305)

5.6 ± 3.4

Female

138

16 ± 1.2

3 (0–60)

30 (0–700)**

33 (0–702)**

7.4 ± 3.3††

  1. Data are shown as mean ± SD (age, ESS), or median (range) (texting/calling). **: p <; 0.01, Mann–Whitney U-test, ††: p <; 0.01, t-test.
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BMC Public Health

ISSN: 1471-2458

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