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

Redmayne, Mary; Smith, Catherine L.; Benke, Geza; Croft, Rodney J.; Dalecki, Anna; Dimitriadis, Christina; Kaufman, Jordy; Macleod, Skye; Sim, Malcolm R.; Wolfe, Rory; Abramson, Michael J.

doi:10.1186/s12940-016-0116-1

Environmental Health

Table 1 Cognitive outcomes by level of phone use: descriptive statistics for CogState Research™ tasks (untransformed)

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

		Mobile phone use/ownership exposure group Median (IQR^a)			Cordless phone use exposure group Median (IQR^a)
Cognitive Test (purpose)	Measure	‘None’^e n = 415	‘Some’^f n = 88	‘More’^g n = 86	‘None’^h n = 114	‘Some’ⁱ n = 256	‘More’^j n = 207
Detection (simple reaction time).	Response^b	347 (306, 420)	351 (297, 411)	367 (321, 412)	344 (309, 414)	346 (304, 403)	359 (307, 420)
Detection (simple reaction time).	Accuracy^c	97 (90,100)	97 (90,100)	96 (90,97)	95 (85, 100)	97 (93, 100)	95 (90, 97)
Identification (choice reaction)	Response^b	596 (524,689)	576 (514,662)	609 (552,705)	580 (526, 670)	593 (521, 671)	602 (534, 694)
Identification (choice reaction)	Accuracy^c	91 (86, 97)	91 (88, 97)	94 (86, 97)	91 (83, 97)	91 (86, 97)	94 (86, 97)
One-back (working memory)	Response^b	980 (810, 1125)	979 (763, 1161)	970 (826, 1120)	964 (774, 1114)	948 (795, 1113)	987 (818, 1137)
One-back (working memory)	Accuracy^c	88 (72, 94)	89 (76, 95)	84 (69, 94)	86 (67, 94)	86 (77, 94)	86 (72, 94)
One card learning (episodic memory)	Response^b	1071 (880, 1312)	1116 (824, 1358)	1135 (941, 1303)	1040 (876, 1305)	1052 (884, 1290)	1119 (853, 1320)
One card learning (episodic memory)	Accuracy^c	58 (48, 65)	57 (49, 65)	58 (47, 65)	56 (48, 64)	59 (51, 66)	58 (46, 65)
Go-NoGo (response inhibition)	Response^b	641 (552, 736)	603 (552, 701)	670 (598, 754)	642 (565, 742)	636 (544, 726)	639 (569, 724)
Go-NoGo (response inhibition)	Accuracy^c	97 (93, 100)	98 (93, 99)	96 (91, 98)	98 (91, 98)	98 (93, 100)	96 (93, 100)
Groton Maze (spatial & executive ability)	Accuracy^d	70 (54, 88)	69 (58, 78)	73 (56, 93)	71 (58, 88)	69 (54, 84)	70 (56, 88)

^aInter Quartile Range; ^bResponse time in milliseconds for true positive and true negatives; ^cAccurate hit rate (%); ^dTotal errors; ^e‘None’ = no MP use; ^f‘Some’ ≤2.5 MP calls per week; ^g‘More’ >2.5 MP calls per week; ^h‘None’ = no CP use; ⁱ‘Some’ ≤2 CP calls per week; ^j‘More’ >2 CP calls per week

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ISSN: 1476-069X

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