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Table 2 Score distribution, corrected item-total correlation and reliability of the IPSS (HK v2) by gender

From: Validation of the International Prostate Symptom Score in Chinese males and females with lower urinary tract symptoms

  Female Male Overall
  n Mean (SD) Corrected item-total correlation n Mean (SD) Corrected item-total correlation n Mean (SD) Corrected item-total correlation
1. Incomplete emptying 126 1.02 (1.22) 0.52 107 1.90 (1.61) 0.58 233 1.42 (1.47) 0.58
2. Frequency 126 2.01 (1.61) 0.37 106 2.37 (1.68) 0.36 232 2.17 (1.65) 0.38
3. Intermittency 126 0.79 (1.34) 0.54 107 1.41 (1.82) 0.56 233 1.07 (1.61) 0.57
4. Urgency 126 1.28 (1.60) 0.35 107 1.39 (1.67) 0.27 233 1.33 (1.63) 0.30
5. Weak stream 125 0.66 (1.22) 0.56 107 1.39 (1.56) 0.54 232 1.00 (1.43) 0.57
6. Straining 126 0.46 (1.03) 0.40 107 0.82 (1.39) 0.41 233 0.63 (1.22) 0.42
7. Nocturia 125 3.38 (1.89) 0.19 105 3.75 (1.65) 0.18 230 3.55 (1.79) 0.20
Total symptom score 124 9.50 (5.88)   104 13.03 (6.81)   228 11.11 (6.55)  
8. Quality of life 126 3.20 (1.89)   106 3.24 (1.80)   232 3.22 (1.85)  
   Female    Male    Overall  
  n Floor Ceiling   n Floor Ceiling   n Floor Ceiling  
Total symptom score 124 2.40% 0.00%   104 1.00% 0.00%   228 1.80% 0.00%  
8. Quality of life score 126 4.80% 3.20%   106 4.70% 5.70%   232 4.70% 4.30%  
   Female    Male    Overall  
Cronbach’s alpha   0.68    0.70    0.71  
   Female    Male    Overall  
Intraclass correlation n    n    n   
Total symptom score 40 0.75   37 0.81   77 0.80  
Quality of life score 41 0.58   38 0.84   79 0.70  
  1. CCs: continence clinics.
  2. GOPCs: general outpatient clinics.
  3. n = number of subject with valid answer.