What is the difference between the acute and standard forms?
There are two versions each of the SF-36® and SF-12® instruments. The Standard versions use the 4 week recall period and the Acute versions use the 1 week recall period. The acute version is particularly useful in instances when the effects of treatment are quick in time. Both surveys are included in the SF-36® and SF-12® manuals. Keller et.al., 1997 published an article that provides empirical results from a study comparing both recall periods. Both versions conform to the assumptions used in scoring the SF-36® and SF-12® as well as reliability and validity standards.
