Table 4.

Mean post-treatment scores for SNOT-22 total scores (n=110)

Characteristics:	6 Month Follow-up Mean [SD]	12 Month Follow-up Mean [SD]	18 Month Follow-up Mean [SD]	F-test statistic	df	p-value
Males	23.3 [17.4]	24.8 [19.7]	27.3 [18.3]	1.82	1.97	0.168
Females	24.9 [17.4]	27.4 [21.7]	29.2 [21.5]	1.85	1.97	0.163
Asthma	24.2 [15.6]	26.8 [22.1]	29.5 [22.0]	2.26	1.89	0.115
Nasal polyposis	22.1 [14.4]	23.1 [17.0]	27.8 [19.6]	3.63	1.92	0.033
Allergies (skin prick / RAST)	24.6 [19.2]	26.4 [22.5]	25.3 [20.1]	0.32	1.95	0.724
ASA intolerance	30.7 [18.9]	37.0 [28.3]	35.4 [23.0]	0.70	1.41	0.467
Depression	31.1 [20.4]	29.1 [20.7]	32.4 [17.3]	0.31	1.53	0.676
Current tobacco smoker	9.0 [13.0]	14.0 [18.5]	18.0 [19.1]	0.28	1.13	0.672
Previous sinus surgery	29.0 [19.7]	31.0 [22.1]	32.7 [21.5]	1.25	1.99	0.289

SD, standard deviation; df, degrees of freedom; RAST, radioallergosorbent testing; ASA, acetylsalicyclic acid; SNOT-22, 22-item Sinonasal Outcome Test