Table 3.
Association between mobile phone screen exposure and cognitive outcomes, adjusting and not for confounders.
| MPSE | HRT-SE (ms) (Inattentiveness) |
PMA-R Score (Fluid Intelligence) |
N-Back Score (Working Memory) |
|||
|---|---|---|---|---|---|---|
| CA | AA | CA | AA | CA | AA | |
| N | 607 | 580 | 605 | 578 | 601 | 574 |
| Low (<9 min/d) |
ref. | ref. | ref. | ref. | ref. | ref. |
| Medium (9–20 min/d) |
14.9 * (0.6, 29.3) |
17.6 * (3.4, 31.7) |
0.36 (−0.73, 1.47) |
−0.15 (−1.25, 0.95) |
0.456 (−0.11, 0.20) |
0.019 (−0.14, 0.18) |
| High (>20 min/d) |
11.1 * (2.8, 25.0) |
12.9 (−0.8, 31.7) |
0.46 (−0.6, 1.52) |
0.11 (−0.95, 1.18) |
−0.428 (−0.19,0.11) |
−0.441 (−0.20, 0.11) |
MPSE, mobile phone screen exposure; HRT-SE, hit reaction time standard error; PMA-R, Primary Mental Ability Test; N, number of subjects with available data. Data are expressed as β coefficients (95% CI) obtained through bivariable linear regression (CA, crude analysis) and multivariable linear regression (AA, adjusted analysis). Cofounders for the AA include sex, BMI, age, and mother’s educational background. * p-value < 0.05.