Table 3.

Comparison of medians (± interquartile range) of test parameters between the study groups

	Poorly controlled asthma (n = 20)	Well controlled asthma (n = 24)	Healthy controls (n = 27)	p value
Serum nitrite concentration (μM)	0.14 ± 0.37	0.12 ± 0.26	0 ± 0.23	0.149
Serum nitrate concentration (μM)	4.79 ± 2.15	3.93 ± 3.28	3.34 ± 2.15	0.003*
Serum NOx concentration (μM)a	5.06 ± 2.31	4.05 ± 3.32	3.53 ± 2.35	0.003*
Serum TAOC (μM)	333.20 ± 36.39	360.02 ± 34.10	362.45 ± 12.45	< 0.001*

^aNO_x denotes NO₂⁻ and NO₃⁻ collectively

*p < 0.05 comparison between the three study groups (Kruskal–Wallis Test)