Table 2 Plasma and serum hormones before and after the expedition, standard units.

From: Preserved circadian variation in cortisol and androgens during a ski traverse of Antarctica in summer

 

Pre − 35 days

Pre − 14 days

Post + 6 days

Post + 13 days

p (time)

p (sex)

p (sex × time)

Cortisol, ng/mL

 Male

96.1 ± 21.5

86.4 ± 18.9

113 ± 22.3

101 ± 22.6

0.194

0.325

0.236

 Female

168 ± 84.6

119 ± 75.2

137 ± 94

148 ± 47.8

F (3, 21) = 1.72

F (1, 7) = 1.12

F (3, 21) = 1.53

Calculated free testosterone, ng/dL

 Male

0.109 ± 0.017

0.109 ± 0.014

0.095 ± 0.026

0.106 ± 0.013

0.015

0.003

0.008

 Female

0.002 ± 0.001

0.038 ± 0.02

0.002 ± 0.001

0.002 ± 0.001

F (3, 21) = 4.37

F (1, 7) = 20.704

F (3, 21) = 5.073

Androstenedione, ng/mL

 Male

0.448 ± 0.05

0.457 ± 0.129

0.521 ± 0.2

0.542 ± 0.186

0.864

0.061

0.405

 Female

0.823 ± 0.121

0.604 ± 0.3

0.658 ± 0.322

0.698 ± 0.103

F (3, 21) = 0.25

F (1, 7) = 4.978

F (3, 21) = 1.017

FSH, mIU/mL

 Male

3.93 ± 1.66

4.45 ± 2.01

4.74 ± 2.01

4.08 ± 1.88

0.014

0.833

0.003

 Female

2.95 ± 2.53

3.03 ± 2.9

4.59 ± 4.27

6.23 ± 4.06

F (3, 21) = 4.49

F (1, 7) = 0.048

F (3, 21) = 6.55

LH, mIU/mL

 Male

2.7 ± 1.29

3.37 ± 1.27

2.54 ± 0.987

2.74 ± 1.14

0.155

0.973

0.005

 Female

1.69 ± 1.82

1.98 ± 1.79

2.97 ± 3.25

6.93 ± 8.39

F (3, 21) = 1.94

F (1, 7) = 0.001

F (3, 21) = 5.714

TSH, mIU/mL

 Male

1.14 ± 0.37

1.4 ± 0.6

2.26 ± 0.719

1.42 ± 0.454

< 0.0001

0.356

0.122

 Female

0.971 ± 0.226

1.18 ± 0.247

1.41 ± 0.568

1.55 ± 1.09

F (3, 21) = 9.05

F (1, 7) = 0.978

F (3, 21) = 2.164

Free T4, ng/dL

 Male

1 ± 0.108

0.937 ± 0.059

0.945 ± 0.054

0.935 ± 0.074

0.089

0.875

0.773

 Female

1.03 ± 0.11

0.89 ± 0.149

0.907 ± 0.118

0.903 ± 0.151

F (3, 21) = 2.48

F (1, 7) = 0.027

F (3, 21) = 0.374

Free T3, pg/mL

 Male

2.8 ± 0.213

2.81 ± 0.273

2.87 ± 0.278

2.74 ± 0.253

0.806

0.59

0.512

 Female

3.04 ± 0.19

2.76 ± 0.378

2.75 ± 0.65

2.86 ± 0.602

F (3, 21) = 0.33

F (1, 7) = 0.318

F (3, 21) = 0.793

Total T3, ng/mL

 Male

0.95 ± 0.095

0.873 ± 0.086

0.98 ± 0.085

0.888 ± 0.12

0.268

0.661

0.237

 Female

1.06 ± 0.1

0.873 ± 0.191

0.873 ± 0.237

0.917 ± 0.248

F (3, 21) = 1.41

F (1, 7) = 0.209

F (3, 21) = 1.527

  1. FSH follicle-stimulating hormone, LH luteinising hormone, TSH thyroid stimulating hormone, T4 thyroxine, T3 triiodothyronine. P values refer to multi-way ANOVA comparing sex and time (i.e. date) using aligned rank transform.
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