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Table 3 Factors affecting FENO by linear regression analysis, without controlling for any other factors Magnitude of effect = change compared to reference group (females, non-smokers, non-atopics, non-rhinitics, non-wheezers, or non-asthmatics)

From: Factors affecting exhaled nitric oxide measurements: the effect of sex

 

All

Males

Females

Factor

Magnitude of effect*

Significance

Magnitude of effect*

Significance

Magnitude of effect*

Significance

Female Gender

0.7605

<0.0001

---

---

BMI

1.0015

0.7571

1.0045

0.5600

0.9966

0.5503

Height

1.0013

<0.0001

1.0003

0.5859

1.0007

0.0969

FEV 1

1.1315

<0.0001

0.9956

0.9328

1.0229

0.7230

FEV 1 % predicted

0.9957

0.0166

0.9988

0.6422

0.9981

0.4432

FVC

1.1058

<0.0001

0.9832

0.6963

1.0443

0.4044

Current smoker (smoked on day of testing)

0.49600

<0.0001

0.43350

<0.0001

0.54337

<0.0001

Current smoker (within last 12 months, not smoked on day of testing)

0.90579

0.0825

0.82377

0.0091

0.89582

0.1945

Atopy (≥3 mm)

1.6028

<0.0001

1.60363

<0.0001

1.5472

<0.0001

Log IgE

1.3897

<0.0001

1.3971

<0.0001

1.3235

<0.0001

Current rhinitis

1.3126

<0.0001

1.2868

0.0002

1.3670

<0.0001

Current wheeze

1.1009

0.0617

1.0906

0.2349

1.1004

0.1658

Current asthma

1.4132

<0.0001

1.4434

<0.0001

1.3495

0.0003

Using ICS

1.3904

0.0004

1.3780

0.0134

1.3755

0.0130