Table 1.

Sociodemographics and medical history comparisons between participants with and without brain fog.

		With Brain Fog (n = 71)		Without Brain Fog (n = 37)		p-Value
Sociodemographics:
	$\mathrm{Age},\bar{\mathrm{x}}$ (SD)	46.4	(9.5)	46.1	(11.7)	0.912 ^
	$\mathrm{Female},\%\bar{\mathrm{x}}$	77.1		59.5		0.055 §
	$\mathrm{BMI}\left(\mathrm{kg}{\mathrm{m}}^{-2}\right),\bar{\mathrm{x}}$ (SD)	28.0	(4.6)	27.8	(5.5)	0.912 ^
	Smoker, %	42.5		37.1		0.284 §
	Third-level education, %	69.0		59.5		0.588 §
	Health/Social care worker, %	38.0		21.6		0.084 §
Comorbid medical conditions:
	Hypertension, %	16.7		28.6		0.238 §
	Heart disease, %	11.7		0.0		0.111 ++
	Respiratory disease, %	16.7		14.3		0.551 ++
	Diabetes, %	5.0		0.0		0.401 ++
Medication:
	Prescribed medication, %	60.9		45.2		0.143 §
	Antihypertensives, %	10.3		12.9		0.471 ++
	β-blockers, %	16.2		12.9		0.464 ++
	Antidepressants, %	19.1		16.1		0.721 §
	Benzodiazepines, %	5.9		0.0		0.216 ++
COVID-19 history:
	Time post-COVID-19 onset (days), $\bar{\mathrm{x}}$ (SD)	380.0	(162.1)	314.9	(164.7)	0.039 +
	Acute COVID-19 hospitalisation, %	22.5		20.0		0.766 §
	Acute COVID-19 ICU admission, %	2.8		5.4		0.292 ++
	Duration of hospitalisation (days), $\bar{\mathrm{x}}$ (SD)	15.5	(17.7)	16.0	(13.0)	0.622 +
	Duration of acute phase (days), $\bar{\mathrm{x}}$ (SD)	20.1	(16.8)	15.3	(12.4)	0.336 +
	Duration of low activity (days), $\bar{\mathrm{x}}$ (SD)	18.2	(17.5)	10.9	(12.2)	0.036 +
	Full vaccination against SARS-CoV-2, %	86.9		85.0		0.656 §

^{^} Independent samples t-test; ⁺ independent samples Mann–Whitney U test; ^§ Chi-square test; ⁺⁺ Fisher’s exact test; $\bar{\mathrm{x}}$, mean; SD, standard deviation; BMI, body mass index; ICU, intensive care unit.