Table 1.

Formula Used to Calculate Continuity Measures

Measure	Definition
Density (UPC)	max $\text{[math]}$ where N = total visits
	n_i = number visits to i^th provider
Dispersion (COC)	$\text{[math]}$ where N = total visits
	n_i = total visits to i^th provider
	p = total number of providers
Sequence (SECON)	$\text{[math]}$ where N = total visits
	$\text{[math]}$
Entropy/Disorganization (VE)	$\text{[math]}$
	where $\text{[math]}$
	n_i = the number of visits to the i^th provider
	k = the total number of possible providers
	N = the total number of visits

COC, dispersion continuity of care; SECON, sequence continuity; UPC, usual provider continuity; VE, visit entropy.