Table 1 Mean values ± standard deviation and 95% confidence intervals

2.78 ± 0.38

2.89 ± 0.38

2.71 ± 0.37

[2.73–2.83]

[2.81–2.96]

[2.65–2.77]

2.75 ± 0.37

2.84 ± 0.41

2.70 ± 0.38

[2.71–2.80]

[2.76–2.92]

[2.64–2.76]

2.87 ± 0.55

2.97 ± 0.50

2.81 ± 0.57

[2.80–2.93]

[2.87–3.06]

[2.72–2.89]

2.86 ± 0.57

3.00 ± 0.52

2.77 ± 0.59

[2.80–2.93]

[2.90–3.10]

[2.68–2.86]

11.94 ± 3.05

13.47 ± 3.07

10.93 ± 2.59

[11.58–12.30]

[12.89–14.05]

[10.54–11.32]

11.95 ± 2.88

13.21 ± 3.03

11.13 ± 2.44

[11.61–12.29]

[12.64–13.79]

[10.75–11.50]