Table 1 Cognitive outcomes by level of phone use: descriptive statistics for CogState Research™ tasks (untransformed)
Mobile phone use/ownership exposure group Median (IQRa) | Cordless phone use exposure group Median (IQRa) | ||||||
|---|---|---|---|---|---|---|---|
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). | Responseb | 347 (306, 420) | 351 (297, 411) | 367 (321, 412) | 344 (309, 414) | 346 (304, 403) | 359 (307, 420) |
Accuracyc | 97 (90,100) | 97 (90,100) | 96 (90,97) | 95 (85, 100) | 97 (93, 100) | 95 (90, 97) | |
Identification (choice reaction) | Responseb | 596 (524,689) | 576 (514,662) | 609 (552,705) | 580 (526, 670) | 593 (521, 671) | 602 (534, 694) |
Accuracyc | 91 (86, 97) | 91 (88, 97) | 94 (86, 97) | 91 (83, 97) | 91 (86, 97) | 94 (86, 97) | |
One-back (working memory) | Responseb | 980 (810, 1125) | 979 (763, 1161) | 970 (826, 1120) | 964 (774, 1114) | 948 (795, 1113) | 987 (818, 1137) |
Accuracyc | 88 (72, 94) | 89 (76, 95) | 84 (69, 94) | 86 (67, 94) | 86 (77, 94) | 86 (72, 94) | |
One card learning (episodic memory) | Responseb | 1071 (880, 1312) | 1116 (824, 1358) | 1135 (941, 1303) | 1040 (876, 1305) | 1052 (884, 1290) | 1119 (853, 1320) |
Accuracyc | 58 (48, 65) | 57 (49, 65) | 58 (47, 65) | 56 (48, 64) | 59 (51, 66) | 58 (46, 65) | |
Go-NoGo (response inhibition) | Responseb | 641 (552, 736) | 603 (552, 701) | 670 (598, 754) | 642 (565, 742) | 636 (544, 726) | 639 (569, 724) |
Accuracyc | 97 (93, 100) | 98 (93, 99) | 96 (91, 98) | 98 (91, 98) | 98 (93, 100) | 96 (93, 100) | |
Groton Maze (spatial & executive ability) | Accuracyd | 70 (54, 88) | 69 (58, 78) | 73 (56, 93) | 71 (58, 88) | 69 (54, 84) | 70 (56, 88) |