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BAROMETRIC CHANGE AND COOLER TEMPERATURES DO AFFECT JOINT PAIN
By merging data collected from an Online Glucosamine Trial (a large scale study of an over-the-counter arthritis treatment) with NOAA data, researchers were able to compare the influence of changes in barometric pressure and surrounding air temperature on patients with knee arthritis.
The Online Glucosamine Trial, included 41 states between 2000 and 2002, tracked 205 arthritis patients, average age 60.2 years, in three-month online randomized controlled trials. Later researchers began to consider weather as an issue. and identified the nearest weather station by zip code for each of participant. They studied temperature, barometric pressure, precipitation and dew point specific to each participant's location. Average values were computed over one, three and seven days prior to each participant's report of pain. The change in each measure in the 24 hours prior to pain reports was also studied. The results showed changes in barometric pressure have a very strong association with increases in knee pain. Cooler temperatures were also consistently, but not as strongly, associated with increased pain. No significant associations were found with dew point or precipitation. Increased barometric pressure was associated with less pain.
The research was presented at the 2004 American College of Rheumatology Annual Scientific Meeting in San Antonio, Texas (Presentation Number: 596 -- Barometric Pressure and Ambient Temperature Influence Osteoarthritis (OA) Pain. Results of A National Web-Based Prospective Study. Timothy E. McAlindon, Margaret K. Formica, Jeremiah Fletcher, Chris Schmid. Tufts - New England Medical Center, Boston, MA).