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Table 2 Baseline data by level of cardiorespiratory fitness (n = 79)

From: Longitudinal associations between cardiorespiratory fitness and stress-related exhaustion, depression, anxiety and sleep disturbances

 Low fitness (n = 20)Medium fitness (n = 26)High fitness (n = 33) 
CharacteristicsNMedianIQRNMedianIQRNMedianIQRp-value
Age, yrs.20397.026438.03348100.001a
Education20  26  32  0.03b
 high, % (n) 45% [9]  65% [17]  81% [27]  
 slow, % (n) 55% [11]  35% [9]  19% [5]  
Body mass index (BMI)2025.55.12624.13.03323.13.80.01a
Current smokers/nicotine users, % (n)2010% [2] 2612% [3] 3219% [6] 0.65b
AUDIT score203.02.5262.03.0332.02.00.60a
Symptom duration, % (n)19  26  32  0.27b
  ≥ 1 year 37% [7]  46% [12]  59% [19]  
  < 1 year 63% [12]  54% [14]  41% [13]  
Use of antidepressants, % (n)2035% [7] 2627% [7] 3330% [10] 0.91b
KSQ insomnia index172.80.8243.01.3312.82.30.51a
KSQ sleepiness index164.21.4234.01.2294.40.60.24a
KSQ premature awakening index182.82.0242.52.0303.21.30.85a
KSQ single item, “poor sleep” quality, % (n)1883% [15] 2352% [12] 3067% [20] 0.12b
HADS depression sum score20107.0269.59.0339.05.00.57a
HADS anxiety sum score20136.026135.033117.00.69a
SMBQ sum score185.61.0256.01.5325.51.00.51a
SMBQ > 4.4, % (n)18100% [18] 2588% [22] 3297% [31] 0.21b
  1. aKruskal-Wallis test; bFisher’s exact test. AUDIT = Alcohol Use Disorders Identification Test; HADS = Hospital Anxiety and Depression Scale; KSQ = Karolinska Sleep Questionnaire; SMBQ = Shirom-Melamed Burnout Questionnaire