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Table 7 Results of logistic regression analysis of ST duration and timing

From: Screen time duration and timing: effects on obesity, physical activity, dry eyes, and learning ability in elementary school children

 

Obesity

Physical activity

Dry eyes

Learning ability

BMI percentiles

Rohrer index

Weekly physical activityb

Dry eyes

Class

Performance

 

ORa

ORa

ORa

ORa

ORa

ORa

95%Cl

95%Cl

95%Cl

95%Cl

95%Cl

95%Cl

Duration of ST

Above 3 h

1

1

1

1

1

1

1-3 h

0.61***

0.65***

1.19*

1.15

2.24***

1.67***

0.50–0.74

0.52–0.81

1.03–1.37

0.97–1.36

1.71–2.94

1.41–1.98

Less than 1 h

0.42***

0.43***

1.27**

1.19

3.93***

2.4***

0.33–0.54

0.32–0.57

1.08–1.48

0.98–1.45

2.70–5.71

1.95–2.96

Timing of STc

No/(Yes)

0.78**

0.73**

1.06

1.31***

1.43**

1.55***

0.65–0.93

0.60–0.90

0.95–1.17

1.15–1.50

1.10–1.86

1.33–1.79

  1. ***p < 0.001, **p < 0.01, *p < 0.05
  2. aOR odds ratio, 95% CI 95% confidence interval
  3. bThe median number of physical activities per week was divided into two
  4. cWhether there was ST just before bedtime