Table 2 Distribution of the language domains presented as (1) median scores and interquartile ranges (IQR) among 2- and 3-year old boys and girls and (2) and frequency of children of risk of difficulties
|  | < 1 h mobile device screen time during a normal weekday |  | ≥ 1 h mobile device screen time during a normal weekday | Difference between medians | |||||
|---|---|---|---|---|---|---|---|---|---|
n | Median | IQR | Children at risk of difficulties n (%)b | n | Median | IQR | Children at risk of difficulties/ n (%)b | pa | |
Language comprehension | Â | Â | Â | Â | Â | Â | Â | Â | Â |
2-year old boys | 7310 | 2 | (1–4) | 615 (8.4) | 608 | 3 | (1–5) | 110 (18.1) | < 0.001 |
2-year old girls | 7003 | 1 | (0–3) | 818 (11.7) | 551 | 2 | (1–4) | 119 (21.6) | < 0.001 |
3-year old boys | 6946 | 1 | (0–2) | 717 (10.3) | 1052 | 1 | (0–3) | 219 (20.8) | < 0.001 |
3-year old girls | 6778 | 0 | (0–1) | 573 (8.4) | 877 | 1 | (0–2) | 147 (16.8) | < 0.001 |
Expressive language skills | Â | Â | Â | Â | Â | Â | Â | Â | Â |
2-year old boys | 7310 | 2 | (1–5) | 700 (9.6) | 608 | 3 | (2–6) | 104 (17.1) | < 0.001 |
2-year old girls | 7003 | 2 | (1–4) | 777 (11.1) | 551 | 2 | (1–4) | 93 (16.9) | < 0.001 |
3-year old boys | 6946 | 1 | (0–2) | 634 (9.1) | 1052 | 1 | (0–3) | 172 (16.3) | < 0.001 |
3-year old girls | 6778 | 0 | (0–2) | 586 (8.6) | 877 | 1 | (0–3) | 151 (17.2) | < 0.001 |