Table 1. Descriptive statistics: Parent reported touchscreen use and sleep patterns in 6- to 36-month-olds.
| Age quartiles |
Total | |||||
|---|---|---|---|---|---|---|
| 6–11 m | 12–18 m | 19–25 m | 26–36 m | 6–36 m | ||
| Age (months) | M (SD) N | 8.99 (1.82) 134 | 14.40 (2.19) 215 | 21.94 (2.07) 179 | 30.64 (3.07) 187 | 19.52 (8.26) 715 |
| Male | % N | 51.49 134 | 53.02 215 | 55.87 179 | 51.34 187 | 53.01 715 |
| Background TV (minutes) | M (SD) N | 209.72 (186.08) 123 | 189.62 (172.70) 194 | 187.00 (162.99) 145 | 219.01 (183.24) 151 | 200.27 (175.99) 613 |
| Touchscreen use (minutes) | M (SD) N | 8.53 (15.54) 123 | 18.80 (36.83) 194 | 25.18 (37.46) 145 | 44.11 (47.75) 150 | 24.45 (38.98) 612 |
| Night-time sleep duration (minutes) | M (SD) N | 637.24 (64.81) 116 | 647.24 (50.13) 176 | 651.25 (60.12) 132 | 643.21 (61.81) 130 | 645.16 58.66 554 |
| Daytime sleep duration (minutes) | M (SD) N | 139.05 (47.27) 116 | 122.47 (38.40) 176 | 100.57 (40.28) 132 | 68.25 (53.20) 126 | 108.29 (51.15) 552 |
| Total sleep (sum of night-time & daytime sleep) | M (SD) N | 776.29 (64.94) 116 | 769.31 (51.84) 175 | 751.82 (71.09) 132 | 711.63 (68.23) 126 | 753.34 (67.84) 549 |
| Average number of night awakenings | M (SD) N | 2.00 (1.73) 116 | 1.29 (1.33) 177 | 0.91 (1.01) 133 | 0.58 (0.81) 130 | 1.17 (1.35) 556 |
| Sleep onset | M (SD) N | 22.80 (23.69) 116 | 21.54 (16.53) 177 | 22.22 (16.97) 131 | 29.34 (27.86) 130 | 23.79 (21.49) 551 |