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Table 2 Odds ratio (OR) and 95% confidence interval (CI) for factors that might explain mobile phone access and regular use. Unconditional logistic regression analysis adjusted for age, gender and household income was used. Number of "exposed" (access or regular use) and "unexposed" (no access, no regular use) in the different categories is shown.

From: Ownership and use of wireless telephones: a population-based study of Swedish children aged 7–14 years

 

Children who reported mobile phone access

Children who reported regular use*

 

Access/no access

OR

95 % CI

Regular use/no regular use

OR

95 % CI

Household income**

      

   Average

553/147

1.0

-

143/395

1.0

-

   <Average

125/45

0.6

0.4 – 0.9

44/78

1.5

0.98 – 2.4

   >Average

420/94

1.3

0.96 – 1.8

97/313

0.9

0.7 – 1.3

H-regions

      

   H1

200/54

1.0

-

69/128

1.0

-

   H2

163/47

1.0

0.6 – 1.7

53/104

0.8

0.5 – 1.4

   H3

390/122

0.9

0.6 – 1.3

89/291

0.5

0.3 – 0.7

   H4

224/45

1.3

0.8 – 2.2

41/177

0.3

0.2 – 0.5

   H5

83/19

1.2

0.6 – 2.3

26/55

0.8

0.4 – 1.5

   H6

64/10

2.0

0.9 – 4.6

14/48

0.5

0.2 – 0.9

Siblings

      

   No

83/14

1.0

-

29/53

1.0

-

   Yes

1041/283

0.4

0.2 – 0.8

263/750

0.5

0.3 – 0.8

Overweight

      

   No

888/223

1.0

-

236/633

1.0

-

   Yes

156/43

1.1

0.7 – 1.7

35/115

0.9

0.6 – 1.4

Obesity

      

   No

1019/254

1.0

-

268/727

1.0

-

   Yes

25/12

0.6

0.3 – 1.3

3/21

0.4

0.1 – 1.4

Spent time watching TV

      

   < 30 min per day

70/30

1.0

-

10/57

1.0

-

   ≥ 30 – 60 min per day

347/132

1.2

0.7 – 2.0

78/260

2.0

0.9 – 4.2

   > 60 – 180 min per day

601/124

1.8

1.05 – 3.2

157/429

2.2

1.1 – 4.6

   > 180 min per day

97/10

2.8

1.1 – 6.9

45/51

3.6

1.6 – 8.4

Spent time playing computer games

      

   Never

143/34

1.0

-

65/75

1.0

-

   < 30 min per day

422/137

1.5

0.9 – 2.5

97/313

0.6

0.4 – 0.997

   ≥ 30 – 60 min per day

298/84

1.7

0.98 – 3.0

63/231

0.6

0.4 – 1.03

   > 60 – 180 min per day

196/37

1.8

0.97 – 3.5

53/134

0.7

0.4 – 1.3

   > 180 min per day

55/1

8.0

0.999 – 64

12/42

0.4

0.2 – 0.96

Regular physical activity

      

   1–7 hours per week

792/230

1.0

-

188/582

1.0

-

   8–14 hours per week

146/15

1.6

0.8 – 3.0

46/99

1.2

0.8 – 1.9

   >14 hours per week

10/4

0.2

0.1 – 0.9

6/4

4.7

1.1 – 19

Use of DECT

      

   Never

136/64

1.0

-

38/92

1.0

-

   < 5 min per day

541/190

1.7

1.1 – 2.5

74/446

0.4

0.3 – 0.7

   ≥ 5 – 15 min per day

295/26

4.3

2.5 – 7.4

91/202

1.0

0.6 – 1.6

   > 15 – 30 min per day

97/6

5.2

1.9 – 14

58/39

2.8

1.5 – 5.0

   > 30 min per day

32/1

4.3

0.5 – 35

26/6

5.7

2.1 – 16

Hours of sleep

      

   7–9 hours

735/119

1.0

-

230/491

1.0

-

   < 7 hours

15/2

0.5

0.1 – 3.0

10/5

3.6

1.1 – 12

   > 9 hours

371/175

0.8

0.6 – 1.1

51/305

0.6

0.4 – 0.8

Enough sleep

      

   Yes

922/262

1.0

-

211/684

1.0

-

   No

185/31

0.9

0.6 – 1.5

75/108

1.5

1.1 – 2.2

  1. * = Defined as talking for ≥ 2 min per day among those who reported mobile phone access.
  2. ** = Adjusted for age and gender.