However, for the second goal (see above), there were not only several independent variables, but also several dependent variables: 4 binary (joints involvement, nails involvement, family history of psoriasis and severity of cutaneous affection) and 1 discrete (age at diagnosis).
For example, the definition of the population into three discrete age classes can be refined with the support of data that would take into account more detailed age class education, work skills, and health status.
The Leslie model combines births and deaths in a single model and it is based on these hypotheses: (i) The age x is a variable starting from 0 and subdivided into n discrete age classes of size h.
Of the remaining 4,189 participants, 1,823 (43.5%) were randomly selected, stratified for age (12 discrete age groups from 24 81 years), sex, and level of general ability (low/high) and equally distributed over four demographically identical test panels.
The physiologic changes, as a result of aging, occur along a continuum rather than in discrete age groups, and life expectancies continually change as medical advances are made.
When reproduction is continuous, as it is in C. elegans populations, the continua of time t and age x can be divided into discrete intervals of arbitrary length, thus approximating a continuous-time model to any desired degree of accuracy by a discrete age-class model ([ 31]: p. 14).
We previously assumed that a single discrete age-range of RBCs was susceptible to infection [14]; some variations include continuously variable or even bimodal susceptibility of RBCs to infection as a function of age, or differences in the fecundity of infected RBCs with age.
Leslie's model is a discrete, age-structured model of population growth.
We used capillary electrophoresis (CE) to measure the levels of d-serine in the mouse retina at discrete ages throughout postnatal development.
