Table 1.

Ratio and average percentages of CGRP-positive neurons that are also CTb-positive compared to the number of CTb-positive neurons.

	Ratio of peptidergic CTb-positive neurons*
	C5	C6	C7	C8	total
injury (n=4 rats)	2/3	6/11	35/64	19/31	62/109
sham (n=5 rats)	1/4	16/21	38/61	30/41	85/127
normal (n=4 rats)	2/6	15/27	37/83	33/45	87/161
total (n=13 rats)	5/13	37/59	110/208	82/117	234/397
	Average % of peptidergic CTb-positive neurons*
	C5	C6	C7	C8	total
injury (n=4 rats)	66.7±57.7%	45.0±33.2%	56.2±18.4%	61.1±13.0%	56.4±9.4%
sham (n=5 rats)	25.0±35.4%	78.4±25.5%	59.8±14.7%	69.4±43.3%	66.9±18.3%
normal (n=4 rats)	41.7±52.0%	47.8±32.6%	45.9±12.6%	75.1±19.8%	53.1±13.7%
total (n=13 rats)	46.9±47.1%	57.1±31.9%	54.4±15.3%‡	68.6±28.3%	59.4±14.8%

^*Note: The denominator is the total number of CTb-positive neurons from all rats in each group for each DRG level; the numerator is the corresponding total number of neurons from all rats in each group that are positive for both CTb and CGRP. The percent values represent the average percent of CTb-positive neurons that are also CGRP-positive for each group and DRG level.

^‡p=0.0084 compared to the percentage of CGRP-positive afferents of all neurons at C7.

CGRP, calcitonin gene-related peptide; CTb, cholera toxin subunit b.