Table 2.
Descriptive statistics of the four age groups for girls and boys.
| Sex/age group | N (SPL) | SPL habitual (cm) | SPL eyes closed (cm) | N (total) | Delta SPL (cm) | Delta PI (-) | Delta Trunk Tilt (°) | Delta Upper Body Tilt (°) |
|---|---|---|---|---|---|---|---|---|
| Girls 6–8 yrs. | 17 | 165.86 ± 47.42 [141.48; 190.24] | 207.98 ± 63.07 [175.55; 240.41] | 23 | 42.12 ± 45.96 [18.49; 65.75] | 0.20 ± 0.30 [0.07; 0.33] | -4.13 ± 4.55 [-6.10; -2.16] | -3.04 ± 5.14 [-5.27; -0.82] |
| Girls 9–11 yrs. | 47 | 140.19 ± 42.51 [127.71; 152.68] | 164.44 ± 49.56 [149.89; 178.99] | 57 | 24.25 ± 30.74 [15.22; 33.28] | 0.09 ± 0.18 [0.05; 0.14] | -1.68 ± 4.61 [-2.91; - 0.46] | -1.68 ± 4.17 [-2.79; -0.58] |
| Girls 12–14 yrs. | 37 | 127.49 ± 44.46 [112.66; 142.31] | 157.16 ± 54.69 [138.92; 175.39] | 57 | 29.67 ± 30.29 [19.58; 39.77] | 0.15 ± 0.29 [0.07; 0.23] | -1.72 ± 5.88 [-3.28; -0.16] | -2.37 ± 4.27 [-3.50; -1.24] |
| Girls 15–17 yrs. | 26 | 123.03 ± 36.53 [108.27; 137.78] | 156.82 ± 56.45 [134.02; 179,62] | 35 | 33.80 ± 37.73 [18.56; 49.03] | 0.14 ± 0.23 [0.06; 0.22] | -1.77 ± 3.90 [-3.11; -0.43] | -2.49 ± 3.65 [-3.74; -1,23] |
| Boys 6–8 yrs. | 15 | 175.57 ± 51.08 [146.08; 205.07] | 215.98 ± 52.93 [185.42; 246.54] | 24 | 40.41 ± 36.99 [19.05; 61.76] | 0.06 ± 0.27 [-0.06; 0.17] | 0.00 ± 4.98 [-2.10; 2.10] | -0.79 ± 4.00 [-2.48; 0.90] |
| Boys 9–11 yrs. | 73 | 158.25 ± 52.85 [145.92; 170.58] | 193.13 ± 67.65 [177.34; 208.91] | 104 | 34.87 ± 47.45 [23.80; 45.94] | 0.09 ± 0.20 [0.05; 0.13] | -1.37 ± 5.13 [-2.36; -0.37] | -1.61 ± 3.62 [-2.31; -0.90] |
| Boys 12–14 yrs. | 70 | 146.90 ± 52.87 [134.30; 159.51] | 178.58 ± 64.69 [163.15; 194.00] | 105 | 31.67 ± 33.26 [23.74; 39.60] | 0.13 ± 0.27 [0.08; 0.18] | -1.55 ± 4.80 [-2.48; -0.62] | -2.41 ± 4.57 [-3.29; -1.52] |
| Boys 15–17 yrs. | 33 | 118.50 ± 34.39 [106.50; 130.50] | 141.33 ± 42.01 [126.00; 155.32] | 51 | 22.83 ± 29.65 [12.32; 33.34] | 0.10 ± 0.17 [0.05; 0.14] | -0.86 ± 3,49 [-1.85; 0.12] | -1.43 ± 3.52 [-2.42; -0.44] |
Data are reported as mean ± standard deviation. Values in brackets specify the 95%-confidence interval of the mean value. SPL = Sway Path Length, PI = Posture Index. Data with the prefix ‘Delta’ are differences between the eyes open and eyes closed measurements.