Table 1.

Rabbit score values for skin reactions (erythema and oedema)

Skin reaction	Value
Erythema formation:
No erythema	0
Very slight erythema (barely perceptible)	1
Well-defined erythema	2
Moderate to severe erythema	3
Severe erythema (beet redness) to slight scar formation (injuries in depth)	4
Necrosis (death of tissue)	+N
Scar (sloughing or scar formation)	+E
Oedema Formation:
No oedema	0
Very slight oedema (barely perceptible)	1
Slight oedema (edges of area well-defined by definite raising)	2
Moderate oedema (raised approximately one millimetre)	3
Severe oedema (raised approximately one millimetre and extending beyond the area of exposure)	4
Total possible score for primary irritation	8