Geophysical variables and behavior: XXVIII. Group health-care-seeking behavior and meteorological variables.

Outpatient visits to a "subtropical" military medical clinic (group health-care-seeking behavior) were correlated to weather variables via stepwise linear regression. Despite several significant sets of correlations, quantitative (r, r2, multiple R, multiple R2 and x2) and qualitative (matrix) analyses did not support the existence of lag/causal relationships between weather and behavior. The largest amount of variance (r2) attributable to an individual weather variable was 3% for lower (minimum) daily mean wind speed per month. No regression accommodated more than 36% of variance. Thus, 64% of variance was due to unidentified variables. A winter "seasonal effect" (December and January) was tentatively identified. Group influenza immunizations and 3-day holidays preceded increased visits.