Figures & data
Figure 1 CitationLudwig scale (1977).
Grade I: Perceptible thinning of the hair on the crown, limited in the front by a line situated 1–3 cm behind the frontal hair line.
Grade II: Pronounced rarefaction of the hair on the crown within the area seen in Grade I.
Grade III: Full baldness (total denudation) within the area seen in Grades I and II.
Figure 2 Sinclair Scale (CitationCollins et al 2006; CitationYip and Sinclair 2006).
Grade 1: is normal. This pattern is found in all girls prior to puberty but in only forty-five percent of women aged eighty or over.
Grade 2: shows a widening of the central part.
Grade 3: shows a widening of the central part and thinning of the hair on either side of the central part.
Grade 4: reveals the emergence of a diffuse hair loss over the top of the scalp.
Grade 5: indicates advanced hair loss.
Figure 3 Savin Scale (CitationSavin 1994).
The Savin scale measures overall thinning of the crown scalp, and consists of 8 crown density images reflecting a range from no hair loss to severe hair loss (Stages I-1, I-2, I-3, I-4, II-1, II-2, III, advanced). The ninth and final image in the scale demonstrates frontal anterior recession.
Table 1 Drug-induced alopecia (CitationSinclair and Dawber 2001)
Table 2 Causes of alopecia in the female (CitationSinclair and Dawber 2001)