Packed bed scrubber: air pollution control device in which emissions pass through alkaline water to neutralise hydrogen chloride gas. skruber z wypełnieniem

Packed tower aeration: method of treating water to remove volatile organic chemical (VOC) contaminants; as water is mixed with air, VOCs move from water to air which then passes through carbon filters to trap the contaminants. napowietrzanie wody w celu usunięcia lotnych zanieczyszczeń

PAHs: cf. polycyclic aromatic hydrocarbonates.

Paid claims loss ratio: paid claims divided by premiums; cf. loss ratio. wskaźnik szkodowości

Paired comparisons: technique in which judges compare health states in pairs and report which is better. Results are converted to an interval scale through Thurstone's law of comparative judgement. porównania sparowane, analiza elementów sparowanych

Paired t-test: hypothesis test about the difference in expected values of normally distributed variables based on one sample of paired values. test t dla par powiązanych

Palliative care: care for people with chronic or life threatening conditions from which they will not recover; focussed on symptom control and family support to help people have the best quality of life they can, given their medical condition. opieka paliatywna

Pancreatitis: inflammation of the pancreas usually caused by gallstones, excessive intake of alcohol, or some medications; can be acute (sudden onset, followed by full recovery) or chronic (slow progress, permanent injury to the pancreas); symptoms include: severe abdominal pain, back pain, shallow breathing, nausea, vomiting; may lead to shock and heart failure. zapalenie trzustki

Pandemic: epidemic occurring over a very wide area (several countries or continents) and usually affecting a large proportion of the population.