Progression-free survival is often calculated for treatment of diseases that are slow growing and difficult to cure, like low grade lymphomas. This term is also used when salvage treatments are offered in situations where the intention is not cure but the control of disease

Examples:

'The 1-year disease-free survival for stage IV Hodgkin lymphoma is 30% when treated with a new combination of drugs.'

This means that after this particular treatment is offered, about 30% of those treated with this new combination will have stable disease without progression at 1 year.

http://lymphoma.about.com/od/glossary/g/progressionfree.htm

C.Humber (5085 santrauka) atliko sisteminę apžvalgą ir metaanalizę visų chemoterapijos režimų, skirtų gimdos kūno vėžiui gydyti. Paaiškėjo, kad citostatikų efektyvumas svyravo nuo 19–39 proc. Tik 5 tyrimų tikslas buvo laikas iki progresavimo (angl. progression-free survival – PFS) ir gyvenimo trukmė (angl. overall survival – OS).

http://www.medicine.lt/index.php?pagrid=leidiniai&subid=gm&s...