Day 1st noted treatment performed: Non-invasive Mechanical Ventilator (j2g)

SAS Name
D1_NIMV 

Non-invasive Mechanical Ventilator (BiPAP/CPAP) (if checked, please specify below)

Code Code value
0 No (all days)
1 Day 1
3 Day 3
5 Day 5
7 Day 7
9 Unknown/Unable to assess