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 3 Correlation between PGI-S and other baseline BPH Measures across race, ethnicity and baseline severity

Spearman’s Correlation	n	IPSS	IPSS-QoL	BII	Qmax
Asian	763	0.45**	0.45**	0.58**	−0.06
Caucasian	860	0.42**	0.43**	0.50**	−0.12**
Hispanic Caucasian	164	0.55**	0.54**	0.55**	−0.14
Non-Hispanic Caucasian	696	0.38**	0.38**	0.49**	−0.12*
Moderate LUTS	1088	0.35**	0.37**	0.49**	−0.04
Severe LUTS	603	0.36**	0.39**	0.50**	−0.11*

Asian: from the 2 studies conducted in Asia; Caucasian: from the 2 studies conducted outside Asia.
PGI-S: Patient Global Impression of Severity; 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