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Table 2 Quantile regression models

From: Effect of high-flow nasal therapy on patient-centred outcomes in patients at high risk of postoperative pulmonary complications after cardiac surgery: a statistical analysis plan for NOTACS, a multicentre adaptive randomised controlled trial

Outcome variable

Explanatory variable(s)

Levels

DAH90

Treatment group

SOT [reference group], HFNT

DAH30

Treatment group

SOT [reference group], HFNT

DAH90

Treatment group

ARISCAT risk category

EUROSCORE II

Gender

COPD

Asthma

Obesity

Current smoker

Lower respiratory tract infection in last 4 weeks

Age

First time or re-do surgery

Country

SOT [reference group], HFNT

Low [reference group], intermediate, high

-

Female [reference group], Male

No [reference group], Yes

No [reference group], Yes

No [reference group], Yes

No [reference group], Yes

No [reference group], Yes

-

First time [reference group], Re-do

UK [reference group], Australia, New Zealand