The greater prevalence of sub-threshold depression in the suicide group confirms that depressed feelings are a risk factor for suicide also in this age group [ 6, 9].
Some studies only report the prevalence of full-threshold diagnoses of anorexia nervosa, bulimia nervosa, and eating disorders not otherwise specified, whereas others also include subclinical eating disorders (1).
The Type I variations of prevalence threshold with low R0 of 1.2 produced counter-intuitive results: the lower statewide prevalence threshold of 0.1% had a higher (16%) attack rate; and the higher statewide prevalence threshold of 10% had a lower (12%) attack rate.
Depending on the stringency of threshold, prevalence rates of irritability range from 3%% for severe, chronic irritability strictly defined in the Great Smoky Mountain study [ 7] to 20 % in the Isle of Wight study [ 8].
The prevalence of normal auditory thresholds was 90.0%.
As with the Type I variation of prevalence threshold, these results arise from shifting the school-closure period to later in the epidemic.
On the question of prevalence threshold for school closure, these simulations offer no evidence to support school closures promptly at the earliest stage of an epidemic, given the need for an 8-week closure period and the typically unknown transmissibility of the virus during an epidemic.
Analysis of ISTH score thresholds showed a high prevalence of DIC for high-weighted thresholds and also a significant prevalence for the thresholds considered as not markers of DIC.
To explore the effect of using different scoring criteria for hypopneas in the scoring of polysomnographic studies: (1) by estimating the level of agreement between apnea-hypopnea index (AHI) scores derived from different scoring methods, and (2) by examining the effect on the point prevalence of disease using different threshold values of the AHI.
The prevalence of fever at each threshold in holders of marked questionnaires (as an estimate of the prevalence in this population of arriving travellers) is also shown, as well as the estimated PPV of ITIS for fever in this population.
SCI takes the latter approach, delineating areas according to the World Health Organization (WHO)–recommended threshold prevalence of 50% for annual mass treatment.
