Table 1.

Capillary density scoring systems.

Reference	Points	Capillary density per mm
Lefford and Edwards [44] Ingegnoli et al. [17]	0	>9
	1	>7–9
	2	>4–7
	3	⩽4
Cutolo and Smith [28]	0	More than 9 capillaries
	1	<33% reduction of capillaries (7–9 capillaries)
	2	33–66% reduction of capillaries (4–6 capillaries)
	3	>66% reduction of capillaries (1–3 capillaries)
Reference	Points	Age ⩽ 40 years	Age > 40 years
Hoerth et al. [29]	0	>7.75	>8.5
	1	>7.25–7.75	>7.75–8.5
	2	>6–7.25	>6–7.75
	3	⩽6	⩽6