Long-Term Mortality following Acute Noninvasive Ventilation for Obesity-Related Respiratory Failure: A Retrospective Single-Centre Study

Table 1

Missingness of data for each variable and group.

	pH ≤ 7.25	pH > 7.25
n	126	151
Age	126 (100%)	151 (100%)
Gender	126 (100%)	151 (100%)
BMI	66 (52%)	81 (54%)
Admission pH	126 (100%)	151 (100%)
Admission PaCO2	126 (100%)	151 (100%)
Admission bicarbonate	126 (100%)	151 (100%)
No. With previous admissions	126 (100%)	151 (100%)
Length of admission	126 (100%)	151 (100%)
Length of acute NIV use	126 (100%)	151 (100%)
Total no. of acute NIV episodes	126 (100%)	151 (100%)
Outcome at end of NIV episode	121 (96%)	150 (99%)
Escalation to ITU	121 (96%)	146 (97%)
Mortality status at two years	126 (100%)	151 (100%)

Values in parentheses represent the proportion of data present for that variable, as a proportion of the total number of patients included in that group.