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Is frictional lichenoid dermatitis a minor variant of atopic dermatitis or a photodermatosis.

Sardana K, Goel K, Garg VK, Goel A, Khanna D, Grover C, Khurana N - Indian J Dermatol (2015 Jan-Feb)

Bottom Line: The number of cases seen per month was compared with the mean monthly UV index.FLE is probably not associated with atopic dermatitis and is likely to be related to the ambient UV index though a larger cohort with meticulous follow up may be needed to draw a final conclusion.P < 0.05 was considered significant.

View Article: PubMed Central - PubMed

Affiliation: Department of Dermatology, Maulana Azad Medical College and Lok Nayak Hospital, New Delhi, India.

ABSTRACT

Context: Frictional lichenoid dermatitis.

Background: Frictional lichenoid dermatitis (FLE) is an entity that is probably under diagnosed and has been variably associated with either friction and/or atopy with a distinctive seasonal variation.

Aims and objectives: To study correlation of FLE with UV index and to assess its association with atopic dermatitis.

Materials and methods: A cross sectional analysis of children with FLE was done, over a period of 6 years in two tertiary hospitals. A detailed history and examination was done to assess the features of atopic dermatitis. The number of cases seen per month was compared with the mean monthly UV index. Two-tailed significance tests using Pearson's coefficient of correlation and T-test were used to interpret the data. (P < 0.05).

Results: One hundred seventy-four patients were studied using the UKC criterion 17.2% of the patients had AD while xerosis (40.3%) was the predominant cutaneous finding. The number of patients seen in summer was more than in winter (P < 0.05) but there was no statistical difference between the cases in winter and spring. There was a significant correlation of the number of cases per month with UV index (P = 0.019). Almost 42% of patients gave a history of recurrence.

Conclusions: FLE is probably not associated with atopic dermatitis and is likely to be related to the ambient UV index though a larger cohort with meticulous follow up may be needed to draw a final conclusion.

Statistical analysis used: The Pearson's coefficient of correlation was used for comparing the cases per month with the UV index. The tests of hypothesis used included the paired T-tests. F-test of variance, Welch test, Wilcoxon rank sum test and the Kolmogorov-Smirnov Test. P < 0.05 was considered significant.

No MeSH data available.


Related in: MedlinePlus

A notched boxplot depicting the number of cases in winter (W), spring (sp) and summer (S)
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Figure 6: A notched boxplot depicting the number of cases in winter (W), spring (sp) and summer (S)

Mentions: Delhi being in the tropics there is a short winter and autumn (October to January) while the spring (February to March) and summers (April to June) seasons tend to overlap. From July to August the monsoons intervene but the temperatures are high and these are included in the summer months. The number of patients in summers (April to September) were more than the cases in winters (November to January) [Table 4], [Figure 6] to enable statistical analysis the number of cases of autumn and winter (24) were compared with the cases in summer (119) and spring (31) using the Paired t-test [Table 5, Figure 6]. The difference between the number of cases in winter and summer was found to be significant (P < 0.05) but there was no statistical difference between the cases in winter and spring [Table 5]. The mean UV Index was 8.02 (SD 3.02; SE 0.88). A correlation [Figure 7, Table 5] of the number of cases per month with the UV index (mean for each month from 2005-2012) was analyzed by Pearson product moment correlation and was also found to be significant (R = 0.658; P = 0.019).


Is frictional lichenoid dermatitis a minor variant of atopic dermatitis or a photodermatosis.

Sardana K, Goel K, Garg VK, Goel A, Khanna D, Grover C, Khurana N - Indian J Dermatol (2015 Jan-Feb)

A notched boxplot depicting the number of cases in winter (W), spring (sp) and summer (S)
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4318066&req=5

Figure 6: A notched boxplot depicting the number of cases in winter (W), spring (sp) and summer (S)
Mentions: Delhi being in the tropics there is a short winter and autumn (October to January) while the spring (February to March) and summers (April to June) seasons tend to overlap. From July to August the monsoons intervene but the temperatures are high and these are included in the summer months. The number of patients in summers (April to September) were more than the cases in winters (November to January) [Table 4], [Figure 6] to enable statistical analysis the number of cases of autumn and winter (24) were compared with the cases in summer (119) and spring (31) using the Paired t-test [Table 5, Figure 6]. The difference between the number of cases in winter and summer was found to be significant (P < 0.05) but there was no statistical difference between the cases in winter and spring [Table 5]. The mean UV Index was 8.02 (SD 3.02; SE 0.88). A correlation [Figure 7, Table 5] of the number of cases per month with the UV index (mean for each month from 2005-2012) was analyzed by Pearson product moment correlation and was also found to be significant (R = 0.658; P = 0.019).

Bottom Line: The number of cases seen per month was compared with the mean monthly UV index.FLE is probably not associated with atopic dermatitis and is likely to be related to the ambient UV index though a larger cohort with meticulous follow up may be needed to draw a final conclusion.P < 0.05 was considered significant.

View Article: PubMed Central - PubMed

Affiliation: Department of Dermatology, Maulana Azad Medical College and Lok Nayak Hospital, New Delhi, India.

ABSTRACT

Context: Frictional lichenoid dermatitis.

Background: Frictional lichenoid dermatitis (FLE) is an entity that is probably under diagnosed and has been variably associated with either friction and/or atopy with a distinctive seasonal variation.

Aims and objectives: To study correlation of FLE with UV index and to assess its association with atopic dermatitis.

Materials and methods: A cross sectional analysis of children with FLE was done, over a period of 6 years in two tertiary hospitals. A detailed history and examination was done to assess the features of atopic dermatitis. The number of cases seen per month was compared with the mean monthly UV index. Two-tailed significance tests using Pearson's coefficient of correlation and T-test were used to interpret the data. (P < 0.05).

Results: One hundred seventy-four patients were studied using the UKC criterion 17.2% of the patients had AD while xerosis (40.3%) was the predominant cutaneous finding. The number of patients seen in summer was more than in winter (P < 0.05) but there was no statistical difference between the cases in winter and spring. There was a significant correlation of the number of cases per month with UV index (P = 0.019). Almost 42% of patients gave a history of recurrence.

Conclusions: FLE is probably not associated with atopic dermatitis and is likely to be related to the ambient UV index though a larger cohort with meticulous follow up may be needed to draw a final conclusion.

Statistical analysis used: The Pearson's coefficient of correlation was used for comparing the cases per month with the UV index. The tests of hypothesis used included the paired T-tests. F-test of variance, Welch test, Wilcoxon rank sum test and the Kolmogorov-Smirnov Test. P < 0.05 was considered significant.

No MeSH data available.


Related in: MedlinePlus