Themes arising from patients' emotional and practical issues around clinic attendance were derived from the data.
The annual exacerbation rate referred to the 12-month period prior to the patient's clinic attendance and was derived from a detailed medical history using an event-based definition; an increase in the patient's dyspnoea, cough and/or sputum beyond normal day-to-day variations, which required treatment with antibiotics and or oral corticosteroids [ 29].
"It has become evident from evidence submitted to the review that fewer than 4% of A&E attendances might derive any benefit from such a reconfiguration.
In this case, we found that some parents had a preference for a gut-driven choice and that this, in turn, could be influenced by feelings of fear and anticipated regret derived from attendance of anti-vaccination meetings.
While the Greaves hypothesis is supported by studies that have looked at day-care attendance, less support is derived from examination of primary care data revealing that cases who developed B-cell precursor ALL between 2 5 years of age had significantly more (not less) clinically diagnosed infectious illness episodes in the first year of life compared with controls.
The costs of hospital attendances and follow-up tests were derived from the NHS Reference Costs Department of Healthh, 2005).
Due to the variable nature of student attendance in alternative high schools, the study participation rate was derived by multiplying the prior year's (2005-2006) attendance rate with the schools' 2006-2007 studenrollmentment [ 40], to give an estimated average adjusted enrollment of 68 students (range: 16 to 107).
Compared with estimates derived from registers of hospital attendance for self-harm, CPRD underestimates the incidence of self-harm by approximately 54.5%.
In the main league table the statistics on school attendance apply to the 1990s and are derived from household survey data, net enrolment data from UNESCO, and data from UNICEF country offices.
selection bias, because DCIs are far from being a random sample of cases; incomplete follow-back, because the earliest recorded date is derived from a more recent hospital attendance than the actual diagnosis date.
