Table 1 Mean values, standard deviation of the continuous variables among four groups at baseline

232.83 (176.52)

234.73 (159.88)

237.79 (181.96)

217.06 (180.76)

241.74 (183.33)

3.83 (1.76)

3.74 (1.63)

3.92 (1.84)

3.85 (1.86)

3.80 (1.73)

2.22 (0.72)

2.21 (0.68)

2.23 (0.72)

2.14 (0.77)

2.30 (0.72)

1.93 (0.76)

1.90 (0.72)

1.92 (0.76)

2.01 (0.81)

1.89 (0.76)

2.93 (1.21)

2.96 (1.16)

3.04 (1.22)

2.78 (1.24)

2.94 (1.20)

3.05 (1.37)

2.92 (1.30)

3.03 (1.36)

2.99 (1.46)

3.25 (1.32)

3.01 (1.03)

2.97 (0.97)

3.06 (1.05)

2.87 (1.12)

3.13 (0.95)

2.81 (1.15)

2.79 (1.10)

2.81 (1.11)

2.72 (1.17)

2.93 (1.22)

2.20 (0.91)

2.19 (0.91)

2.21 (0.95)

2.18 (0.95)

2.21 (0.88)

2.37 (0.87)

2.33 (0.82)

2.36 (0.87)

2.34 (0.96)

2.44 (0.82)

1.94 (0.70)

2.01 (0.72)

1.92 (0.70)

1.90 (0.71)

1.91 (0.69)

3.42 (0.78)

3.32 (0.80)

3.44 (0.79)

3.43 (0.81)

3.48 (0.74)

20.56 (2.36)

20.3 (2.19)

20.53 (2.49)

20.83 (2.48)

20.49 (2.25)