Table 1 Descriptive statistics of participant age, gender, and other covariate factors

Age

Mean ± Standard deviation

5.0 ± 0.52

4.5 ± 0.50

4.21 ± 0.43

4.26 ± 0.45

Family’s financial situation

Poor

0

1 (2.6%)

0

0

Generally

9 (23.7%)

31 (81.6%)

33 (86.6%)

38 (100%)

Very good

29 (76.3%)

6 (15.8%)

5 (13.3%)

0

Father’s education

College and below

5 (13.2%)

10 (23.6%)

14 (36.8%)

12 (31.6%)

Undergraduate

20 (52.6%)

22 (57.9%)

19 (50.0%)

26 (68.4%)

Graduate and above

13 (34.2%)

6 (15.8%)

5 (13.2%)

0

Mother’s education

College and below

4 (10.5%)

8 (21.1%)

12 (31.6%)

10 (26.3%)

Undergraduate

20 (52.6%)

18 (47.4%)

20 (52.6%)

28 (73.7%)

Graduate and above

14 (36.8%)

12 (31.6%)

6 (15.8%)

0

Physical activity per week

Inactive

0

0

0

0

1 time

0

0

1 (2.6%)

0

2–3 times

10 (23.6%)

5 (13.2%)

1 (2.6%)

2 (5.3%)

4–5 times

13 (24.2%)

8 (21.1%)

9 (23.7%)

32 (84.2%)

6–7 times

15 (39.5%)

25 (85.8%)

27 (71.1%)

4 (10.5%)

Duration of each activity

Below 10 min

2 (5.3%)

0

1 (2.6%)

0

15–20 min

9 (23.7%)

2 (5.3%)

4 (10.5%)

3 (7.9%)

30–40 min

24 (63.2%)

31 (81.6)

16 (42.1%)

22 (57.9%)

At least 1 h

3 (7.9%)

5 (13.2%)

17 (44.7%)

13 (34.2%)

Daily level of attention

Difference

1 (2.6%)

1 (2.6%)

8 (21.1%)

0

Poor

11 (28.9%)

19 (50.0%)

6 (15.8%)

1 (2.6%)

Good

22 (57.9%)

11 (28.9%)

17 (44.7%)

33 (86.8%)

Very good

4 (10.5%)

7 (18.4%)

7 (18.4%)

4 (10.5%)

Number of views of natural environment videos or pictures per week

Do not watch

1 (2.6%)

0

0

0

1 time

0

9 (23.7%)

8 (21.1%)

0

2–3 times

21 (55.3%)

21 (55.3%)

17 (44.7%)

11 (68.4%)

4–5 times

15 (39.5%)

8 (21.1%)

10 (26.3%)

26 (68.4%)

6–7 times

1 (2.6%)

0

3 (7.9%)

1 (2.6%)

Duration of each viewing

2–5 min

24 (63.2%)

2 (5.3%)

9 (23.7%)

9 (23.7%)

5–10 min

6 (15.8%)

23 (60.5%)

14 (36.8%)

3 (7.9%)

10–15 min

8 (21.1%)

13 (34.2%)

6 (15.8%)

22 (57.9%)

At least 20 min

0

0

9 (23.7%)

4 (10.5%)