Climatic variables and admissions for mania: a reanalysis.
Differencing and cross-correlations are useful and straightforward methods for dealing with relationships between variables measured over short periods of time. Without such transformations of time-series data, spurious relationships may emerge and the true nature of underlying relationships may be obscured. This reanalysis of data from Carney et al. (1989) suggests that there is a strong relationship between amount of sunshine in a month and admissions for mania one month later.
Peck
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Area Clinical Psychology Service (Highland Health Board), Craig Phadrig Hospital, Inverness, U.K.
D001714:Bipolar Disorder / Q000453:epidemiology*; D002980:Climate; D003430:Cross-Sectional Studies; D004739:England / Q000453:epidemiology; D006760:Hospitalization / Q000639:trends*; D006801:Humans; D015994:Incidence; D012621:Seasons; D014887:Weather