Table 3.
Mean levels, standard deviations, and t test values of times per week in leisure‐time vigorous physical activity in 1985/1986 and 2014
| Boys | Girls | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1985/1986 | 2014 | Time difference | Effect size | 1985/1986 | 2014 | Time difference | Effect size | |||||||||
| n | M | SD | n | M | SD | t | d | n | M | SD | n | M | SD | t | d | |
| Finland | ||||||||||||||||
| 11‐year‐olds | 577 | 2.97 | 2.21 | 956 | 3.39 | 2.39 | −3.45* | 0.18 | 589 | 2.21 | 1.83 | 1011 | 3.13 | 2.27 | −8.86* | 0.43 |
| 13‐year‐olds | 463 | 3.26 | 2.31 | 887 | 3.38 | 2.39 | −0.91 | 0.05 | 461 | 2.25 | 1.88 | 927 | 3.26 | 2.29 | −8.81* | 0.47 |
| 15‐year‐olds | 540 | 3.11 | 2.38 | 928 | 3.36 | 2.46 | −1.86 | 0.10 | 546 | 2.19 | 2.00 | 994 | 3.40 | 2.33 | −10.71* | 0.55 |
| Norway | ||||||||||||||||
| 11‐year‐olds | 718 | 3.22 | 2.10 | 583 | 3.96 | 2.12 | −6.29* | 0.35 | 641 | 2.52 | 1.81 | 627 | 3.49 | 1.96 | −9.12* | 0.51 |
| 13‐year‐olds | 611 | 2.97 | 1.90 | 426 | 3.68 | 2.14 | −5.49* | 0.35 | 689 | 2.67 | 1.87 | 476 | 3.36 | 1.94 | −6.01* | 0.36 |
| 15‐year‐olds | 666 | 3.03 | 2.11 | 393 | 3.80 | 2.37 | −5.34* | 0.34 | 623 | 2.61 | 1.95 | 446 | 3.37 | 2.04 | −6.17* | 0.38 |
Gender differences in 1985/1986 Finland: 11 y (t = 6.42, P < 0.001, d = −0.38), 13 y (t = 7.32, P < 0.001, d = −0.48), 15 y (t = 6.96, P < 0.001, d = −0.42). Gender differences in 2014 Finland: 11 y (t = 2.51, P = 0.012, d = −0.11), 13 y (t = 1.08, ns), 15 y (t = −0.34, ns). Gender differences in 1985/1986 Norway: 11 y (t = 6.55, P < 0.001, d = 0.36), 13 y (t = 2.86, P = 0.004, d = 0.15), 15 y (t = 3.74, P < 0.001, d = 0.21). Gender differences in 2014 Norway: 11 y (t = 4.02, P < 0.001, d = 0.23), 13 y (t = 2.36, P = 0.02, d = 0.16), 15 y (t = 2.82, P = 0.005, d = 0.19).
*
P < 0.001