Table 4: Prevalence of risk factors among cases and controls.

VariableCasesControls value

Occupation9 (15)11 (11)0.459
Poor exposure to sun22 (36.7)32 (32)0.456
Exposure to dust51 (85)54 (54)<0.001
A/C6 (10)55 (55)<0.001
Plants13 (21.7)30 (30)0.25
Animals19 (31.7)24 (24)0.29
Cockroaches41 (68.3)44 (44)0.003