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International Journal of Bipolar Disorders

Table 2 Estimates of parameters for the 64-min active morning and evening periods according to phase of bipolar disorder, adjusted for multiple comparisons, and controlling for age and gender

From: A pilot study to determine whether combinations of objectively measured activity parameters can be used to differentiate between mixed states, mania, and bipolar depression

Activity parameter

Phase of illness

Morning period

Evening period

Mean

95% CI

Mean

95% CI

Mean activity count per minute

Bipolar depression

218.53

132.02

305.04

154.86

95.98

213.75

Mania

229.80

154.24

305.37

239.34

187.91

290.78

Mixed state

281.72

164.41

399.02

254.49

174.65

334.33

SD in % of mean activity count

Bipolar depression

117.42

98.88

135.96

129.48

104.58

154.37

Mania

90.04

73.84

106.24

92.11

70.36

113.85

Mixed state

85.68

60.54

110.83

111.13

77.38

144.88

RMSSD in % of mean activity

Bipolar depression

108.12

85.20

131.05

124.81

96.79

152.84

Mania

88.75

68.72

108.78

90.75

66.26

115.23

Mixed state

84.71

53.62

115.80

97.61

59.61

135.61

Autocorrelation

Bipolar depression

.56

.46

.67

.53

.43

.62

Mania

.49

.40

.58

.49

.40

.58

Mixed state

.51

.37

.65

.60

.47

.74

Sample entropy

Bipolar depression

1.05

.70

1.40

1.03

.65

1.41

Mania

1.41

1.11

1.72

1.36

1.03

1.69

Mixed state

1.55

1.08

2.03

.96

.44

1.47

Fourier analysis (2–8 min/8–64 min)

Bipolar depression

.67

.38

.96

.77

.41

1.14

Mania

.90

.64

1.15

1.05

.73

1.37

Mixed state

.97

.58

1.37

.58

.08

1.07

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