baseline


Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.
Related to baseline: baseline data

baseline

 [bās´līn]
an observation or value that represents the normal or beginning level of a measurable quality, used for comparison with values representing response to experimental intervention or an environmental stimulus, usually implying that the baseline and reponse values refer to the same individual or system.

baseline

/base·line/ (bās´līn) a value representing a normal background level or an initial level of a measurable quantity and used for comparison with values representing response to an environmental stimulus or intervention.

baseline

[bās′līn]
Etymology: Gk, basis + L, linea
1 a known value or quantity with which an unknown is compared when measured or assessed (e.g., baseline vital signs).
2 the patient�¢ï¿½ï¿½s initial information at diagnosis or assessment against which later tests will be compared.
3 (in radiology) any of several basic anatomical planes or locations used for positioning purposes. They include the orbitomeatal, infraorbitomeatal, acanthomeatal, and glabellomeatal lines.

baseline

Clinical trials
The health state—disease severity, confounding conditions, etc.—present in a person or group of individuals at the beginning of a prospective study.
 
The baseline is time “zero”, before the participants in the study receive an experimental agent or intervention, or negative control; drug safety and efficacy may be determined by monitoring changes in baseline values; variations in distributions of baseline values between groups may introduce bias in the results.
 
Informatics
A measure of cumulative citation frequency across all Derwent Section classes, which shows upward and downward trends in a particular patent family.

Sleep disorders
The normative (i.e., typical) state of a person or of an investigative parameter before an experimental manipulation.
 
Vox populi
A generic term for any basal, null or unstimulated state, often represented as a horizontal line.

base·line

(bās'līn)
1. A line approximating the base of the skull, passing from the infraorbital ridge to the midline of the occiput, intersecting the superior margin of the external auditory meatus; the skull is in the anatomic position when the baseline lies in the horizontal plane.
Synonym(s): orbitomeatal line.
2. Level of performance or aggregate findings before initiation of therapy.

Baseline

A return to an original state.
Mentioned in: Sedation

baseline,

n the horizontal axis on a graph drawn by the pen recorder.

base·line

(bās'līn)
1. A line approximating the base of the skull, passing from the infraorbital ridge to the midline of the occiput, intersecting the superior margin of the external auditory meatus.
2. Level of performance or aggregate findings before therapy.
Synonym(s): orbitomeatal line.

baseline,

n a reference point used to indicate the initial condition against which future measurements are compared.

baseline

a known value or quantity used to measure or assess an unknown, as a baseline urine sample.

baseline data
a set of data collected at the beginning of a study or before intervention has occurred.
References in periodicals archive ?
Second, I describe why spending in the baseline should grow in nominal terms, despite calls (especially from conservatives) for a nominal freeze.
Consequently, the baseline in the DSS-SAR system usually is consisted of both across-track baseline and along-track baseline.
However, if energy recovery ventilation is included in the proposed design with a system over 2400 1/s (5,000 cfm) and 70% outside air or more, it must be included in the baseline as well, unless there are fume hoods meeting the fume hood requirements.
As a result, calculating the baseline and incremental levels is critical to comprehensive category planning and promotion evaluation.
Finally, a baseline aids decision making by providing a documented, known, and understood starting point and context for analysis.
The fact that low baseline levels of 25-OHD did not enhance treatment effects in this study "may be explained by the rather high mean baseline 25-OHD levels observed in our study participants, which is likely owing to vitamin D fortification in dairy products and activity level of our healthy and relatively young community-dwelling older participants," the investigators noted.
Only 8% of the case-managed LTS students from Year 1 who reenrolled were long-term suspended again during Year 2 of the EAS program, compared to a recidivism rate of 26% in the baseline year.
One of the key elements of spiral development for Tier II is that as technology matures, it should be inserted in the baseline system or matured for future spirals (see Figure 2).
The BaseLine 11 is the fourth size in the BaseLine Series of sanitary plate heat exchangers.
The PoE support simplifies the installation of wireless access points and connects each access point to the Baseline Switch 2226-PWR for power and data.
Optimization analyses were used to determine the structures with the greatest mass savings at given performance levels (measured in terms of bending and torsional stiffness, modal response, and peak stress), create a two-dimensional feasibility study that compared loads against the outline of the baseline frame, and define the package space.
Mean heart rate was 153 bpm on day two, as opposed to 134 at baseline.