Table 2 Serum melatonin level(pg/ml)

Day 1

 3:00

73

97.33 ± 48.83

15

97.33(48.97,97.33)

58

97.33(80.72,97.33)

0.123

 8:00

76

76.62 ± 80.83

17

41.61(28.18,72.46)

59

62.79(50.20,76.62)

0.048^*

 16:00

76

77.41 ± 91.17

17

42.40(25.54,68.88)

59

61.73(41.52,80.10)

0.084

 CV

76

0.40 ± 0.38

17

0.23(0.09,0.97)

59

0.26(0.12,0.55)

0.940

Day 2

 3:00

76

138.72 ± 151.56

17

58.80(36.13,95.52)

59

106.09(68.34,162.12)

0.002^*

 8:00

76

75.39 ± 67.80

17

47.35(29.54,66.47)

59

64.54(45.40,89.27)

0.009^*

 16:00

50

72.55 ± 74.34

15

41.71(27.35,70.15)

35

61.12(29.24,94.63)

0.216

 CV

76

0.42 ± 0.31

17

0.29(0.10,0.36)

59

0.41(0.24,0.63)

0.050

Day 3

 3:00

48

132.73 ± 122.13

15

53.52(31.74,115.75)

33

114.93(62.91,179.48)

0.032^*

 8:00

48

76.10 ± 74.62

15

38.88(15.94,70.20)

33

75.66(42.21,119.87)

0.014^*

 16:00

26

68.03 ± 74.82

11

34.54(18.29,68.03)

15

68.03(39.63,93.22)

0.047^*

 CV

48

0.45 ± 0.36

15

0.59(0.15,0.75)

33

0.36(0.14,0.55)

0.225

All CV

76

0.50 ± 0.35

17

0.44(0.20,0.79)

59

0.39(0.24,0.70)

0.704