Correlation between serum uric acid and pulmonary arterial hypertension based on echo probability in patients with obstructive sleep apnea syndrome

The Egyptian Journal of Bronchology

Table 4 Comparing groups of patients with normal and elevated uric acid levels

	Total (n = 100)		Uric acid				Test of sig	p
	Total (n = 100)		Normal (n = 26)		Elevated (n = 74)
	No	%	No	%	No	%
Sex
Male	66	66.0	22	84.6	44	59.5	χ² = 5.426^*	0.020^*
Female	34	34.0	4	15.4	30	40.5	χ² = 5.426^*	0.020^*
Age (years)
Min.–max	33.0–70.0		33.0–65.0		36.0–70.0		t = 2.464^*	0.015^*
Mean ± SD	53.04 ± 8.45		49.62 ± 8.66		54.24 ± 8.09
Median (IQR)	53.0 (49.0–58.0)		53.0 (45.0–55.0)		54.0 (50.0–60.0)
BMI
Overweight	6	6.0	6	23.1	0	0.0	χ² = 15.601^*	MC p < 0.001^*
Obese	90	90.0	20	76.9	70	94.6
Morbid obese	4	4.0	0	0.0	4	5.4
Min.–max	25.50–40.96		25.50–38.10		30.44–40.96		t = 4.974^*	< 0.001^*
Mean ± SD	34.69 ± 3.10		31.99 ± 3.48		35.64 ± 2.31
Median (IQR)	35.43 (32.4–36.76)		31.20 (30.60–34.8)		35.99(34.2–36.9)
ESS
Normal (≤ 10)	6	6.0	2	7.7	4	5.4	χ² = 0.178	^FEp = 0.649
Abnormal (> 10)	94	94.0	24	92.3	70	94.6	χ² = 0.178	^FEp = 0.649
Min.–max	10.0–20.0		10.0–20.0		10.0–20.0		t = 0.705	0.485
Mean ± SD	13.90 ± 2.62		13.54 ± 3.24		14.03 ± 2.37
Median (IQR)	14.0 (12.0–16.0)		12.0 (11.0–15.0)		14.0 (12.0–16.0)

IQR Interquartile range, SD Standard deviation, t Student t-test, χ² chi-square test, MC Monte Carlo, FE Fisher exact, p p-value for comparing between different categories
^*Statistically significant at p ≤ 0.05