The use of NON and NOD.B10 serves as a control for the differences due to genetic background, as NOD.B10 differs from NOD by the MHC genes and NON differs from NOD for approximately 30 40% of the polymorphic markers.
Allergens and non allergens differed significantly in pI, net charge, and EP (p<0.0001).
It is possible that non responders differed from responders.
Lastly, some patients did not participate, which could lead to bias if non participants differed systematically from participants.
A low response rate may cause non-response bias if non-respondents differ systematically from respondents [ 5].
Non-response can introduce bias if non-responders differ from responders with respect to prognostic characteristics.
Non-response is an issue if non-respondents differ from respondents on the key measures of interest.
Offenders and non-offenders differed in age, intelligence, educational level and experience of childhood sexual abuse, whereas paedophiles and non-paedophiles mainly differed in sexual characteristics (e.g., additional paraphilias, onset and current level of sexual activity).
Additionally, members and non-members differ in other characteristics.
Migrants and non-migrants differed in their response behavior, particularly due to address- and literacy-related reasons.
This scenario, however, is unlikely since non-respondents differed neither in demographic nor in clinical epilepsy characteristics from respondents.
