In medical research, cross-sectional studies differ from case-control studies in that they aim to provide data on the entire population under study, whereas case-control studies typically include only individuals with a specific characteristic, with a sample, often a tiny minority, of the rest of the population.
(redirected from Variable Expense) Also found in: Dictionary, Wikipedia. A cost that is directly proportional to the volume of output produced. When production is zero, the variable cost is equal to zero. A cost to a person or business that varies over time according to a number of factors.
Operating expenses fall into two categories: fixed and variable. Your fixed expenses are the same from month to month regardless of whether you are seeing patients or not. Your variable expenses change from month to month based on the volume of business you do and what is needed to support that volume of business. Purchases that fall under the operating expense category are less than a pre-determined amount â maybe less than $500 in a practice or less than $1000 in a hospital.