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Table 3 Mobile phone use cognitive test results for response time

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 Response time ‘None’ 0   
‘Some’ -0.010 (-0.033, 0.014) 0.41
‘More’ 0.005 (-0.019, 0.030) 0.66
Identificationb Choice reaction and visual attention Response time ‘None’ 0   
‘Some’ -0.009 (-0.032, 0.015) 0.47
‘More’ 0.009 (-0.014, 0.032) 0.42
One-back taskb Working memory Response time ‘None’ 0   
‘Some’ 0.001 (-0.024, 0.027) 0.93
‘More’ -0.003 (-0.022, 0.016) 0.77
Go/NoGob Response inhibition Response time ‘None’ 0   
‘Some’ -0.001 (-0.020, 0.019) 0.96
‘More’ 0.029 (0.003, 0.054) 0.03
One-card learningb Visual recognition and episodic memory Response time ‘None’ 0   
‘Some’ 0.008 (-0.026, 0.043) 0.63
‘More’ 0.003 (-0.034, 0.039) 0.87
Stroop Ac   Response time ratio ‘None’ 0   
‘Some’ 0.008 (-0.020, 0.036) 0.55
‘More’ -0.008 (-0.040, 0.024) 0.63
Stroop Cd   Response time ratio ‘None’ 0   
‘Some’ -0.010 (-0.085, 0.066) 0.79
‘More’ 0.018 (-0.052, 0.087) 0.61
  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 simple reaction time for the “Detection” task, the ‘Some’ coefficient is -0.010. This indicates the adjusted mean is lower in the ‘Some’ group than the ‘None’ group
  2. bBase 10 log transformed data originally in milliseconds (response time tests)
  3. cTime ratio (B-A)/A
  4. dTime ratio (D-C)/C
  5. Statistically significant results are in bold font