Diagnostic model for impending death in cancer patients based upon Palliative Performance Scale and drooping of the nasolabial folds

PPS	Drooping of nasolabial fold, present/absent	3-day mortality rate (%)
≤20%	present	94
≤20%	absent	42
30 to 60%		16
≥70%		3

PPS: Palliative performance scale.

Data from: Hui D, Hess K, dos Santos R, et al. A diagnostic model for impending death in cancer patients: preliminary report. Cancer 2015; 3914.

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