The geography of non-ocular malignant melanoma in India: its association with latitude, ozone levels and UV light exposure
✍ Scribed by Sarala Krishnamurthy
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- French
- Weight
- 421 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0020-7136
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✦ Synopsis
Ultraviolet light from sunlight is implicated in the aetiology of non-ocular malignant melanoma, mostly from Western studies. 'This study reports the relation of such melanomas from 7 'cancer registries in different parts of India with latitude, ,altitude, ozone levels and ultraviolet (UV) light exposure. A log linear model was fitted using GLIM, assuming Poisson errors in incidence; linear and non-linear regression techniques were also used. Results show slight negative associations of melanoma with latitude, 2 = -3.37, p = 0.07, and statistically nonsignificant ones with atmospheric ozone levels (r = -0.36, n.s.), ;and a positive association with UV (r = 0.30, n.s.). Melanoma iincidence from 4 places relates in a parabolic curve with latitude I = 1-0.09 2 + 0.003 2 in males and y = I .73-0. I 7 2 + 0.005 in females). Patients originally from west coastal ethnic/ linguistic communities predominate in Bombay. Geographic patterns of melanoma in Indians are similar with those in white Caucasians. Ultraviolet light exposure may also be involved in its aetiology in non-white Caucasians, such as Indians.