Sociodemographic Factors, Nutritional Status, and Inflammatory Markers in Patients with Postural Orthostatic Tachycardia Syndrome

Table 4

Serum levels of CRP and nutrient parameters.

	Healthy controls	POTS	value
High-sensitive CRP (<5 mg/L)	0.68 (0.35–1.38)	1.35 (0.62–2.98)	0.006
Albumin (36–48 g/L)	44 (41–45)	41 (40–44)	0.014
Cobalamin (156–672 pmol/L)	294 (231–362)	300 (244–363)	0.549
Folic acid (>8 nmol/L)	19 (15–24)	18 (12–27)	0.503
25-OH vitamin D (>75 nmol/L)	63 (49–80)	68 (54–80)	0.292
Iron (9–34 μmol/L)	18 (14–22)	17 (12–22)	0.719
TIBC (47–80 μmol/L)	67 (61–73)	69 (60–76)	0.692
Ferritin (men: 22–322 μg/L) (women: 10–291 μg/L)	34 (15–74)	31 (14–50)	0.574
Sodium (137–145 mmol/L)	141 (139–142)	142 (141–143)	0.003
Potassium (3.5–4.4 mmol/L)	4.0 (3.8–4.2)	3.9 (3.8–4.0)	0.029
Magnesium (0.70–0.95 mmol/L)	0.78 (0.75–0.83)	0.80 (0.76–0.84)	0.169
Phosphorus (men 18-50 år: 0.70–1.6 mmol/L; women ≥18 år: 0.80–1.5 mmol/L)	1.2 (1.1–1.3)	1.1 (1.0–1.3)	0.103

Two missing values in POTS and 10 missing values in controls. CRP: C-reactive protein; POTS: postural orthostatic tachycardia syndrome; TIBC: total iron-binding capacity. Reference values within brackets are taken from the Department of Clinical Chemistry, Skåne University Hospital, Malmö, Sweden [21]. Values are given as median and interquartile ranges. Mann–Whitney U test. was considered statistically significant.