Reference values for exhaled nitric oxide (reveno) study

Respiratory Research

Table 1 Demographic data, physical parameters and FE_NO values in studied subjects. Mean values and standard deviation (SD).

	Males		Females		Total		Values		P value*
	No.	Value	No.	Value	No.	Value	Min	Max
Age (yrs)	102	37.0 ± 9.5	102	35.0 ± 10.1	204	36.1 ± 9,9	19	59	n.s.
Weight (kg)	102	77.6 ± 12.2	102	59.9 ± 9.8	204	68.8 ± 14.2	44	112	0.001
Height (cm)	102	176	102	164	204	170	148	190	0.001
BMI (m/kg²)	102	25.1	102	22.2	204	23.7	17.2	35.4	0.001
BSA (m²)	102	1.7	102	1.5	204	1.6	1.3	2.1	0.001
FE_NO 50 (ppb)	102	11.7 ± 5.0	102	9.9 ± 4.3	204	10.8 ± 4.7	0.7	28.8	0.01
FE_NO 100 (ppb)	92	7.1 ± 3.0	86	5.6 ± 2.5	178	6.4 ± 2.9	1.7	16.9	0.001
FE_NO 200 (ppb)	93	4.4 ± 2.0	86	3.5 ± 1.4	179	4.0 ± 1.8	0.9	10.7	0.001
FVC (litres)	102	5.2 ± 0.8	102	3.8 ± 0.5	204	4.5 ± 1.0	2.3	7.1	0.001
FVC % predicted	102	108.3 ± 12.7	102	109.8 ± 12.3	204	109.1 ± 12.5	79	147.4	n.s.
FEV₁ (litres/1 sec)	102	4.2 ± 0.6	102	3.2 ± 0.4	204	3.7 ± 0.7	2.0	5.8	0.001
FEV₁ % predicted	102	105.7 ± 11.5	102	107.3 ± 9.3	204	106.5 ± 10.5	78	133.7	n.s.

Abbreviations: n.s. = not significant; FENO 50 = fractional exhaled nitric oxide in parts per billion (ppb) at an expiratory flow of 50 mL/sec; FENO 100 = fractional exhaled nitric oxide in parts per billion (ppb) at an expiratory flow of 100 mL/sec; FENO 200 = fractional exhaled nitric oxide in parts per billion (ppb) at an expiratory flow of 200 mL/sec; FEV1 = forced expiratory volume (litres) in one second; FVC = forced vital capacity (litres); BMI = body mass index; BSA= body surface area; Min = minimum value; Max = maximum value
* Mann-Whitney U-test comparing male and female subjects

ISSN: 1465-993X