As mentioned before, until now data on the ECEC system had been based on self-reported information by the heads of ECEC institutions and ECEC class teachers.
However, the effectiveness of disaster preparedness training for nursing students has been limited, to some extent, since they have been based on self-evaluation.
The majority of the quantitative research into doping behaviour has been based on self-reports, where athletes are not only asked to report on their own attitudes, perceived injunctive and/or descriptive norms but also asked to confess their compromising behaviour (i.e. taking prohibited substances).
Adherence measurement has more typically been based on self-reported data and assessed post-randomization.
Finally, most previous studies have been based on self-reported injuries.
15, 22 Studies that have examined multimorbidity across age groups have generally been small, included only a small number of conditions, or have been based on self-reporting.
In prior survey studies of teams in nursing homes, the assessment of teams has been based on self-reported data from the care workers [ 29, 30].
BMI in particular was not obtained in a standardized way and may even have been based on self-reported weight and height measurements in some cases.
In most studies, exposure assessment has been based on self-reported use with only a few exceptions utilizing network operator records [ 4- 6].
Until now, the gold standard for clinically diagnosing RA patients has been based on self-reported symptoms, assessment of swollen and tender joints, quantification of levels of rheumatoid factor, anti-CCP auto-antibodies against citrullinated filaggrin peptides, as well as imaging techniques, such as X-ray of the joints.
Previous research concerning associations between SRH and sick leave has mainly been based on study-populations consisting of employees from specific sectors of the work force [ 9, 11, 12] or been based on self-reported data with regards to sick-leave [ 10].
