Table 1: Prevalence of skin allergies in adolescents in Namibia.

Factor Atopic dermatitis Contact dermatitis Urticaria Angioedema Hay fever Total p-value
Age group 0.064
15-17 13 (20.0) 6 (12.8) 2 (10.0) 4 (44.4) 1 (11.1) 26 (17.3)
18-20 11 (16.9) 5 (10.6) 4 (20.0) 1 (11.1) 1 (11.1) 22 (14.7)
21-23 12 (18.5) 9 (19.1) 4 (20.0) 2 (22.2) 0 (0) 27 (18.0)
24-26 13 (20.0) 13 (27.7) 5 (25.0) 1 (11.1) 2 (22.2) 34 (22.7)
27-30 16 (24.6) 14 (29.8) 5 (25.0) 1 (11.1) 5 (55.6) 41 (27.3)
Gender 0.245
Males 22 (33.8) 24 (51.1) 9 (45.0) 4 (44.4) 3 (33.3) 62 (41.3)
Females 43 (66.2) 23 (48.9) 11(55.0) 5 (55.5) 6 (66.7) 88 (58.7)
Ethnic group 0.536
Vamboes 21 (32.3) 13 (27.2) 11(55.0) 3 (33.3) 3 (33.3) 51 (34.0)
Herero 10 (15.4) 8 (17.2) 3 (15.0) 1 (11.1) 1 (11.1) 23 (15.3)
Damara/Nama 5 (7.7) 6 (12.8) 3 (15.0) 0 0 14 (9.3)
Coloured 10 (15.4) 2 (4.3) 1 (5.0) 2 (22.2) 3 (33.3) 18 (12.0)
Kavango 4 (6.2) 3 (6.4) 0 1 (11.1) 0 8 (5.3)
Caprivians 3 (4.3) 6 (12.8) 0 1 (11.1) 1 (11.1) 11 (7.3)
Tswana 3 (4.3) 5 (10.6) 1 (5.0) 1 (11.1) 1 (11.1) 11 (7.3)
Others 9 (13.8) 4 (8.5) 1 (5.0) 0 0 14 (9.3)
Occupation 0.042
Cleaning 6 (9.2) 8 (17.0) 2 (10.0) 0 1 (11.1) 17 (11.3)
Farming 3 (4.6) 3 (6.4) 2 (10.0) 0 1 (11.1) 9 (6.0)
Office work 6 (9.2) 2 (4.3) 1 (5.0) 1 (11.1) 2 (22.2) 12 (8.0)
Street business 6 (9.2) 7 (14.9) 2 (10.0) 0 0 15 (10.0)
Security guard 4 (6.2) 2 (4.3) 1 (5.0) 0 0 7 (4.7)
Hair dresser 4 (6.2) 3 (6.4) 2 (10.0) 0 1 (11.1) 10 (6.7)
Students 33 (50.8) 18 (38.3) 6 (30.0) 3 (33.3) 1 (11.1) 61 (40.7)
Others 3 (4.6) 4 (8.4) 4 (20.0) 5 (55.6) 3 (33.3) 19 (12.7)
Possible causes 0.026
Medication 5 (7.7) 4 (8.5) 1 (5.0) 1 (11.1) 0 11 (7.3)
Weather change 10 (15.4) 8 (17.0) 11 (55.0) 4 (44.4) 2 (22.2) 35 (23.3)
Dust/sweat 7 (10.8) 1 (2.1) 4 (20.0) 1 (11.1) 1 (11.1) 14 (9.3)
Clothes 4 (6.2) 4 (8.5) 1 (5.0) 0 2 (22.2) 11 (7.3)
Cosmetics 8 (12.3) 5 (10.6) 0 0 0 13 (8.7)
Jewelleries 5 (7.7) 4 (8.5) 0 0 0 9 (6.0)
Family (genetics) 8 (12.3) 0 0 0 0 8 (5.3)
Detergents/plants 6 (9.2) 11 (23.4) 2 (10.0) 2 (22.2) 3 (33.3) 24 (16.0)
Pollen/food 12 (18.5) 10 (21.3) 1 (5.0) 1 (11.1) 1 (11.1) 25 (16.7)
Total 65 (43.4) 47 (31.3) 20 (13.3) 9 (6) 9 (6) 150 (100)

All percentages are given in parentheses. The denominator for all row /column total percentages is sample size 150 but the denominators for all cell percentages are the respective column totals.