Table 2 Normal Distribution of Dickkopf-1 Levels in Study Subjects.

From: Decreased Circulating Levels of Dickkopf-1 in Patients with Exudative Age-related Macular Degeneration

Group

N

Dickkopf-1 Levels (pg/mL)

Normal distribution tested†

Mean ± SD

Minimum

Maximum

Z values

P values

Healthy controls

111

699.21 ± 272.99

179.45

1460.77

0.856

0.456

Atrophic AMD

46

643.61 ± 253.22

287.86

1351.23

0.601

0.862

Exudative AMD

 Total

128

471.78 ± 192.39

108.37

1045.14

1.178

0.124

 Unilateral CNV

93

479.95 ± 200.38

108.37

1045.14

1.111

0.169

 Bilateral CNV

35

450.09 ± 170.13

158.74

896.78

0.751

0.626

 Occult CNV

81

504.52 ± 202.73

139.85

1045.14

1.131

0.155

 Classic CNV

47

415.37 ± 159.93

108.37

785.80

0.615

0.843

  1. AMD = age-related macular degeneration; CNV = choroidal neovascularization.
  2. †Data were tested by one-sample Kolmogorov–Smirnov test and were considered normal distribution when P > 0.05.
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