Table 3.

Extreme predicted survival probabilities for 256 possible combinations of the variables

CPAP	Age	Sex	Hypertension	From care home	Intubated	Time	Group	Survival probabilities
Yes	60	Female	No	No	No	≤7 days	Early	0.91
Yes	60	Female	No	No	No	≤7 days	Late	0.91
Yes	60	Female	Yes	No	Yes	≤7 days	Early	0.89
Yes	60	Female	Yes	No	Yes	≤7 days	Late	0.89
…See online supplemental files for values in between…
No	80	Male	No	Yes	Yes	≤7 days	Early	0.00
No	80	Male	No	Yes	Yes	≤7 days	Late	0.00
Yes	80	Male	No	Yes	Yes	>7 days	Early	0.00
Yes	80	Male	No	Yes	Yes	>7 days	Late	0.00

Only the top four and bottom four are shown. We considered only two ages 60 and 80 years online supplemental file 2.

CPAP, continuous positive air pressure.