A meta-analysis of growth hormone data showing similar double amplitudes of 36 and 34% of the mean from the fit of cosine curves with periods of 1.3 and 1.0 year, respectively, suggests the desirability of analyzing available time series on variables of interest in biomedicine, to explore heretofore unknown longer-than-yearly cycles that may interact (beat) with yearly ones.
Bibliographical noteFunding Information:
This study was supported by a NIH grant (GM-13981) to FH; and by the University of Minnesota Supercomputing Institute (to GC, FH).
- Growth hormone
- Longer-than-yearly cycle
- Yearly cycle