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Table 4 Mobile phone use cognitive test results for accuracy

From: Use of mobile and cordless phones and cognition in Australian primary school children: a prospective cohort study

Test Skill Parameter Call group Regression coefficienta 95 % CI for coefficient p
Detectionb Simple reaction time and psychomotor speed Accuracy ‘None’    
‘Some’ 0.007 (-0.087, 0.100) 0.89
‘More’ -0.004 (-0.061, 0.053) 0.89
Identificationb Choice reaction and visual attention Accuracy ‘None’    
‘Some’ 0.018 (-0.036, 0.073) 0.50
‘More’ -0.012 (-0.077, 0.052) 0.70
One-back taskc Working memory Accuracy ‘None’    
‘Some’ 0.033 (-0.024, 0.091) 0.24
‘More’ -0.035 (-0.094, 0.024) 0.23
One-card learningc Visual recognition and episodic memory Accuracy ‘None’    
‘Some’ 0.005 (-0.032, 0.042) 0.78
‘More’ -0.026 (-0.074, 0.023) 0.30
Groton Maze Learningd Spatial and executive ability Accuracy ‘None’    
‘Some’ -0.036 (-0.093, 0.022) 0.21
‘More’ 0.021 (-0.057, 0.100) 0.58
Go/NoGoc Response inhibition Accuracy ‘None’    
‘Some’ 0.025 (-0.033, 0.083) 0.39
‘More’ -0.042 (-0.108, 0.025) 0.21
  1. aThese are regression coefficients adjusted for age, gender, language other than English, handedness, and socioeconomic status. The coefficient represents the difference in adjusted means of the outcome between each of the exposure groups ‘Some’ and ‘More’ and the non-exposed reference group ‘None’. For example, for the accuracy in the “Detection” task, the ‘Some’ coefficient is 0.007and the ‘More’ coefficient -0.004. This indicates the adjusted mean is higher in the ‘Some’ group but lower in ‘More’ group when compared to the ‘None’ group
  2. bBase 10 log transformed data originally in milliseconds (response time tests)
  3. cSquare root arcsine transformed data (accuracy tests)
  4. dBase e log transformed (total number of errors)
  5. eTime ratio (B-A)/A
  6. fTime ratio (D-C)/C