A health [ ] is a regular group difference at one time; a health [ ] is change over time.
A health trend is a regular group difference at one time; a health pattern is change over time.
A health disparity is a regular group difference at one time; a health correlation is change over time.
A health correlation is a regular group difference at one time; a health sequence is change over time.
A health pattern is a regular group difference at one time; a health trend is change over time.