9 Also, we have no objective data regarding whether an individual questionnaire respondent did, in fact, attempt to contact the out of hours GP service within the relevant time period, therefore we were unable to ascertain the extent of individual item "missingness" with regard to the out of hours questions within the overall questionnaire.
In previous work we developed the CRIS-CAT by drawing upon a large item pool: Extent of Participation (77 item pool), Perceived Limitation in Participation (144 item pool) and Satisfaction with Participation (86 item pool) [ 16].
Finally, we assessed the acceptability of the questionnaires by calculating the extent of missing items within each HRQL instrument.
Pathological severities were estimated by extent of 10 items: a. thickness of synovium lining layer; b. pannus; c. synovium inflammatory cells; d. angiogenesis; e. cartilage erosion; f. bone erosion; g. joint ankylosis; h.
Consistent with previous investigations [ 11], three OHIP-14 estimates were derived from subjects' responses: Severity (cumulative OHIP-14 score), prevalence (proportion of subjects reporting fairly/very often one or more items) and extent (number of items reported fairly/very often) of impacts were calculated as measures of OHRQoL.
The extent and pattern of item non-response to income is different from developed countries being higher and varying differently with age.
9 Other characteristics of the diseases than their symmetric/asymmetric or proximal/digital nature may explain, even though to a lesser extent, the variations of item difficulty hierarchy between disorders.
There were three items in the Extent of Participation scale, six items in the Perceived Limitations scale, and one item in the Satisfaction with Participation scale with ICCs below 0.5 (Table 3) Summary scores were equivalent by mode and that there was no evidence of an ordering effect (Table 4).
In deference to his supposed fragility, Pearl pampers him to the remarkable extent of clipping disturbing items from the newspaper.
Severity (cumulative OHIP-14 score) and extent of impact (number of items reported fairly/very often) scores were calculated as measures of OHRQoL.
