Reexamining age, race, site, and thermometer type as variables affecting temperature measurement in adults – A comparison study
Repository Posting Date2017-06-07T20:31:37Z
Author(s)Smith, Linda S.
Lead Author Sigma AffliationNon-member
Level of EvidenceCase Study
Research ApproachQuantitative Research
KeywordsBody Temperature; Thermometers; Body Temperature Determination; Body Temperature Determination--Evaluation; Body Temperature Determination--Methods; Body Temperature Determination--Methods--In Adulthood; Thermometers
CINAHL HeadingsBody Temperature Determination; Body Temperature Determination--Evaluation; Body Temperature Determination--Methods; Body Temperature Determination--Methods--In Adulthood; Thermometers
Background: As a result of the recent international vigilance regarding disease assessment, accurate measurement of body temperature has become increasingly important. Yet, trusted low-tech, portable mercury glass thermometers are no longer available. Thus, comparing accuracy of mercury-free thermometers with mercury devices is essential. Study purposes were 1) to examine age, race, site as variables affecting temperature measurement in adults, and 2) to compare clinical accuracy of low-tech Galinstan-in-glass device to mercury-in-glass at oral, axillary, groin, and rectal sites in adults.
- Setting: 176 bed accredited healthcare facility, rural northwest US.
- Participants: Convenience sample (N = 120) of hospitalized persons ≥ 18 years old.
- Instruments: Temperatures (°F) measured at oral, skin (simultaneous), immediately followed by rectal sites with four each mercury-glass (BD) and Galinstan-glass (Geratherm) thermometers; 10 minute dwell times.
Results: Participants averaged 61.6 years (SD 17.9), 188 pounds (SD 55.3); 61% female; race: 85% White, 8.3% Native Am., 4.2% Hispanic, 1.7 % Asian, 0.8% Black. For both mercury and Galinstan-glass thermometers, within-subject temperature readings were highest rectally; followed by oral, then skin sites. Galinstan assessments demonstrated rectal sites 0.91°F > oral and ≅ 1.3°F > skin sites. Devices strongly correlated between and across sites. Site difference scores between devices showed greatest variability at skin sites; least at rectal site. 95% confidence intervals of difference scores by site (°F): oral (0.142 – 0.265), axilla (0.167 – 0.339), groin (0.037 – 0.321), and rectal (-0.111 – 0.111). Race correlated with age, temperature readings each site and device.
Conclusion: Temperature readings varied by age, race. Mercury readings correlated with Galinstan thermometer readings at all sites. Site mean differences between devices were considered clinically insignificant. Still considered the gold standard, mercury-glass thermometers may no longer be available worldwide. Therefore, mercury-free, environmentally safe low-tech Galinstan-in-glass may be an appropriate replacement. This is especially important as we face new, internationally transmitted diseases.
DescriptionThermometer devices and sheaths were donated by BD (mercury-in-glass) and RG Medical Diagnostics (Galinstan-in-glass). Funding for this investigation was received by the Oregon Health & Science University (OHSU) from two supporting sponsors: Geratherm Medical Diagnostic Systems and RG Medical Diagnostics. Funding requests were initiated by OHSU staff. Grant sources of the study had no role in study design, data collection, data analysis/interpretation, or report writing.The principal investigator (manuscript author) formulated and implemented all aspects of this study and report.
Date of Publication2003-06-15
Citation of Original PublicationSmith, L. S. (2003). Reexamining age, race, site, and thermometer type as variables affecting temperature measurement in adults – A comparison study. BMC Nursing 2 (1). DOI: 10.1186/1472-6955-2-1. Retrieved from http://www.nursinglibrary.org/vhl/handle/10755/621459
ISSN: BMC Nursing
Version of PublicationPublisher's version
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