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Table 3 The distribution of the SNOT-22 items over the four time points and the results of Wilcoxon sign rank test that shows the difference between the median of the SNOT-22 items preoperative and 6 months post ESS

From: Pattern of symptom improvement following endoscopic sinus surgery for chronic rhinosinusitis

Items Preoperative 1st week post ESS 1st month post ESS 6th months post ESS Wilcoxon sign rank
Mdn M SD Mdn M SD Mdn M SD Mdn M SD Z p
Need to blow nose 3.00 2.91 0.94 3.00 2.81 1.14 2.00 2.06 0.91 1.50 1.91 1.65 − 3.93 < 0.001
Nasal blockage 4.00 3.08 0.94 2.00 2.04 1.02 2.00 2.03 0.77 1.00 1.53 1.065 − 6.44 < 0.001
Sneezing 3.00 2.84 0.70 2.00 2.00 0.93 2.00 1.99 0.82 0.00 1.19 1.65 − 5.88 < 0.001
Runny nose 3.00 2.87 0.86 1.00 1.19 1.08 1.50 1.57 0.83 0.00 1.06 1.43 − 6.21 < 0.001
Cough 2.00 2.00 0.86 1.00 1.03 0.67 1.00 1.00 0.62 1.00 1.03 1.16 − 4.86 < 0.001
Post-nasal discharge 2.00 2.10 0.88 3.00 2.93 0.92 2.00 2.00 0.69 2.00 2.10 2.10 − 0.27 0.770
Thick discharge 3.00 2.88 0.94 2.00 2.06 1.06 0.50 0.69 0.90 1.00 1.70 1.78 − 0.450 < 0.001
Ear fullness 2.00 2.01 0.89 1.00 1.22 1.08 1.00 1.44 1.63 0.00 1.07 1.54 − 4.18 < 0.001
Dizziness 1.00 1.12 0.87 0.50 0.75 0.94 0.00 0.81 1.52 0.00 0.72 1.39 − 3.22 0.001
Ear pain 1.50 1.56 0.57 0.00 0.38 1.08 0.00 0.88 1.45 0.00 0.82 1.30 − 4.09 < 0.001
Facial pain/pressure 0.00 0.99 1.61 1.50 1.56 0.90 1.00 1.26 1.14 1.00 1.5 1.83 − 2.89 0.003
Decreased sense of smell/taste 3.50 3.35 1.09 2.50 2.37 1.19 2.00 2.13 1.89 1.00 1.74 1.87 − 5.17 < 0.001
Difficulty falling asleep 2.50 2.40 0.79 0.50 0.75 0.96 1.00 1.31 1.62 0.00 0.79 1.25 − 6.18 < 0.001
Wake up at night 1.50 1.59 1.01 1.00 1.06 0.77 0.50 1.13 1.45 0.00 0.59 1.01 − 3.26 0.001
Lack of a good night’s sleep 2.00 2.03 0.93 0.50 0.69 0.86 1.00 1.50 1.7 0.00 0.74 1.30 − 5.57 < 0.001
Wake up tired 0.50 0.74 0.91 0.50 0.72 0.93 0.50 1.31 1.66 0.00 0.69 1.18 1.14 0.260
Fatigue 0.50 0.86 1.10 0.50 0.74 0.93 0.00 1.06 1.57 0.00 0.81 1.31 − 1.31 0.190
Reduced productivity 0.50 0.68 0.81 0.50 0.72 0.92 0.00 1.00 1.55 0.00 0.54 1.07 − 1.70 0.089
Reduced concentration 0.00 0.62 1.06 1.00 1.15 0.85 0.50 0.72 0.93 0.50 1.19 1.52 − 3.49 0.004
Frustrated/restless/irritable 1.00 1.18 0.95 0.5 0.74 0.93 0.50 1.31 1.66 0.00 0.53 1.24 − 4.20 < 0.001
Sad 0.00 0.46 1.21 0.00 0.34 1.08 0.00 0.12 0.56 0.00 0.88 1.5 1.12 0.305
Embarrassed 0.00 0.34 1.13 0.00 0.12 0.56 0.00 1.00 1.51 0.00 0.59 1.24 1.82 0.074