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

Table 3 Baseline data by self-reported physical activity level (n = 83): the “low physical activity”, “medium physical activity” and “high physical activity” level

	Low fitness			Medium fitness			High fitness
Characteristics	N	Median	IQR	N	Median	IQR	N	Median	IQR	p-value
Age, yrs.	13	43	5	49	41	7.0	21	48	13	0.04^a
Education	13			48			21			0.68^b
high, % (n)		77% [10]			63% [30]			67% [14]
low, % (n)		23% [3]			37% [18]			33% [7]
Body mass index (BMI)	13	21.9	5.1	49	24.5	4.1	21	23.7	2.7	0.07^a
Current smokers/nicotine users, % (n)	13	8% [1]		48	15% [7]		21	19% [4]		0.75^b
AUDIT score	13	2.0	4.0	49	2.0	2.0	21	3.0	1.0	0.41^a
Symptom duration	13			47			21			0.02^b
≥ 1 year		85% [11]			40% [19]			57% [12]
< 1 year		15% [2]			60% [28]			43% [9]
Use of antidepressants, % (n)	13	31% [4]		49	33% [16]		21	19% [4]		0.59^b
KSQ insomnia index	12	2.9	1.9	48	3.0	1.3	19	2.8	1.5	0.54^a
KSQ sleepiness index	11	3.8	1.6	47	4.2	1.0	17	4.8	1.2	0.04^a
KSQ premature awakening index	13	1.7	2.3	48	2.7	1.7	18	3.7	1.7	0.01^a
KSQ single item, poor sleep quality, % (n)	13	69% [9]		47	68% [32]		18	67% [12]		0.99^a
HADS depression sum score	13	13	6.0	49	9.0	7.0	21	9.0	5.0	0.10^a
HADS anxiety sum score	13	14	8.0	49	12	7.0	21	11	5.0	0.50^a
SMBQ sum score	12	6.5	0.9	45	5.6	1.1	21	5.2	1.0	0.002^a
SMBQ > 4.4, % (n)	12	100% [12]		45	96% [43]		21	90% [19]		0.62^b

^aKruskal-Wallis test; ^bFisher’s exact test. AUDIT = Alcohol Use Disorders Identification Test; HADS = Hospital Anxiety and Depression Scale; KSQ = Karolinska Sleep Questionnaire; SD = standard deviation; SMBQ = Shirom-Melamed Burnout Questionnaire

ISSN: 1471-2458