Table I.
Comparison of children with normal weight and overweight – values of measured parameters
| Type of electronic devices | Gender | Normal weight | Overweight | P-values | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average ± SD (range) | N (%) | Average ± SD (range) | N (%) | |||||||||
| Number of days | Minutes a day | Minutes a week | Number of days | Minutes a day | Minutes a week | Number of days | Minutes a day | Minutes a week | ||||
| Tablet | Girl | 2.6 ±1.2 (1–7) |
41.1 ±25.1 (15–120) |
102.4 ±56.9 (15–240) |
60 (49.2) | 2.8 ±1.2 (1–7) |
54.5 ±30.2 (15–120) |
139.3 ±73.8 (30–300) |
21 (35.6) | 0.7¥ | 0.04*¥ | 0.02*¥ |
| Boy | 2.8 ±1.4 (1–7) |
41.2 ±24.0 (15–90) |
108.2 ±64.7 (15–300) |
38 (44.7) | 2.6 ±1.1 (1–5) |
47.8 ±27.3 (15–90) |
117.0 ±76.2 (30–300) |
37 (50) | 0.46¥ | 0.26¥ | 0.58¥ | |
| PC | Girl | 3.9 ±1.2 (1–5) |
49.7 ±24.2 (15–120) |
202.4 ±134.3 (30–600) |
110 (90.2) | 4.0 ±1.2 (1–5) |
61.9 ±30.3 (15–120) |
251.2 ±168.6 (10–600) |
47 (79.7) | 0.39£ | 0.008**£ | 0.05*£ |
| Boy | 4.13 ±1.1 (1–7) |
55.3 ±25.5 (15–120) |
231.5 ±134.8 (30–600) | 75 (88.2) | 4.0 ±1.2 (1–5) |
62.1 ±26.9 (30–120) |
254.8 ±148.8 (30–600) |
64 (86.45) | 0.63£ | 0.12£ | 0.33£ | |
| TV | Girl | 2.4 ±1.1 (1–6) |
36.1 ±33.6 (5–120) |
101.4 ±120.8 (10–720) |
121 (99.2) | 2.7 ±1.2 (2–7) |
37.9 ±39.8 (5–120) |
132.2 ±106.9 (5–600) |
57 (96.6) | 0.79¥ | 0.74¥ | 0.17¥ |
| Boy | 2.5 ±1.1 (1–7) |
32.3 ±30.8 (5–120) |
93.3 ±90.8 (5–600) |
83 (97.6) | 2.5 ±1.4 (1–7) |
42.7 ±41.9 (5–120) |
139.5 ±178.8 (5–600) |
74 (100) | 0.33£ | 0.09£ | *0.04£ | |
| Mobile phone | Girl | 3.8 ±1.54 (1–7) |
40.6 ±21.6 (15–90) |
160.4 ±130.5 (15–450) |
55 (44.7) | 2.5 ±1.7 (1–6) |
48.9 ±20.6 (15–90) |
244.2 ±119.9 (30–540) |
34 (57.6) | 0.0008¥** | 0.07¥ | 0.003¥** |
| Boy | 4.7 ±1.4 (2–7) |
25.1 ±19.17 (10–90) |
236.0 ±141.8 (30–450) |
28 (32.9) | 4.3 ±1.2 (1–7) |
28.3 ±23.5 (5–90) |
210.9 ±146.1 (5–550) |
45 (60.8) | 0.16¥ | 0.3¥ | 0.46¥ | |
| Internet portals | Girl | 4.5 ±1.1 (2–5) |
62.4 ±26.9 (25–120) |
285.9 ±146.9 (60–600) |
92 (75.4) | 4.7 ±0.8 (2–5) |
58.4 ±24.6 (15–120) |
278.2 ±125 (40–600) |
53 (89.8) | 0.17¥ | 0.37¥ | 0.76¥ |
| Boy | 3.8 ±0.4 (3–4) |
59.1 ±27.3 (15–120) |
223.9 ±108.2 (60–480) |
85 (100) | 3.8 ±0.9 (3–5) |
60.5 ±25.3 (15–120) |
218.1 ±116.3 (15–600) |
61 (82.4) | 0.75¥ | 0.76¥ | 0.76¥ | |
| Total time [min/week] |
Girl | 405.63 ±260.71 (10–1440) | 122 (100) | 518.09 ±380.53 (5–1620) | 59 (100) | 0.02¥* | ||||||
| Boy | 420.17 ±259.51 (5–1230) | 85 (100) | 546.58 ±344.22 (20–1410) | 74 (100) | 0.009¥** | |||||||
*
p < 0.05
**
p < 0.001. Data are mean ± SD: standard deviation and range; p-value according to
£
Mann-Whitney U test for continuous variables with non-normal distribution
¥
Student’s t test for continuous variables with normal distribution; PC – personal computer.