Note: OR: odds ratio, CI: confidence interval, ref: reference
(a) Adjusted for age and sex
(b) Adjusted for age, sex, sinus type and number of orifices
(c) Adjusted for age, sex, sinus type, number of orifices, duration of surgery, length of stay and wound healing time
(d) Adjusted for age, sex, sinus type, number of orifices, duration of surgery, length of stay, wound healing time and presence of any type of complication