Construct validation of patient global impression of severity (PGI-S) and improvement (PGI-I) questionnaires in the treatment of men with lower urinary tract symptoms secondary to benign prostatic hyperplasia

Table 5 Correlation between PGI-I and other BPH Measures (change from baseline) across race, ethnicity and baseline severity

Spearman’s Correlation	n	IPSS	IPSS-QoL	BII	Qmax
Asian	747	0.55**	0.52**	0.43**	−0.15**
Caucasian	816	0.57**	0.54**	0.49**	−0.13**
Hispanic Caucasian	158	0.65**	0.45**	0.49**	−0.15
Non-Hispanic Caucasian	658	0.55**	0.54**	0.49**	−0.14*
Moderate LUTS	1050	0.53**	0.52**	0.44**	−0.12**
Severe LUTS	577	0.62**	0.54**	0.51**	−0.19**

Asian: from the 2 studies conducted in Asia; Caucasian: from the 2 studies conducted outside Asia.
PGI-I: Patient Global Impression of Improvement; IPSS: International Prostate Symptom Scores; IPSS QoL: IPSS-Quality of Life (QoL), BII - Benign Prostatic Hyperplasia Impact Index; Qmax: peak urine flow rate; LUTS: Lower Urinary Tract Symptoms; n: number of patients. **: p<0.001; *: p<0.05.

ISSN: 1471-2490