The SF-20 has shown floor effects with hospitalized patients and contains no sexual dimension. The NHP has been influential in Europe and consists of two parts. The instrument is self-administered. This questionnaire is short and easy to administer with patients or the general population. The NHP focuses on negative experiences while excluding the positive experience of a condition or disease.
Patients mark items that describe themselves on that day in terms of individual health.
The SIP is scored according to the number and type of items endorsed. The SIP is able to discriminate between severity of sickness and has been reported to have good convergent and discriminant validity. The SIP has good test-retest reliability and high internal consistency. The SIP emphasizes dysfunction related to sickness in daily activities rather than disease and doesn't measure subjective QOL facets such as feelings. The SIP also doesn't measure positive functioning.