A patient-reported pressure ulcer health-related quality of life instrument for use in prevention trials (PU-QOL-P): psychometric evaluation

Table 2 Spearman’s rho correlations between PUQOL-R and SF12 scales (convergent validity)

Scale (n items)	Physical function (2)	Role physical (2)	Bodily pain (1)	General health (1)	Vitality (1)	Social function (1)	Role emotional (2)	Mental health (2)
Pain (12)	0.072	0.109^a	0.320^a	0.220^a	0.168^a	0.046	0.201^a	0.261^a
Exudate (8)	0.005	0.112	0.036	0.046	0.237	0.183	0.229	0.279^b
Odour (6)	0.118	0.235	0.109	0.149	0.022	0.154	0.160	0.063
Sleep (7)	0.143^a	0.137^a	0.283^a	0.203^a	0.110^b	0.008	0.246^a	0.282^a
Movement & mobility (9)	0.151^a	0.133^a	0.350^a	0.214^a	0.171^a	0.036	0.299^a	0.300^a
Daily activities (6)	0.086	0.071	0.197^a	0.139^a	0.027	0.046	0.238^a	0.218^a
Malaise (5)	0.030	0.017	0.229^a	0.205^a	0.024	0.076	0.293^a	0.274^a
Emotional well-being (15)	0.034	0.037	0.227^a	0.179^a	0.012	0.030	0.323^a	0.275^a
Self-consciousness and appearance (7)	0.034	0.053	0.219^a	0.119^a	0.053	0.045	0.249^a	0.206^a
Itchiness (1)	0.006	0.080	0.130^a	0.071	0.033	0.030	0.100^b	0.100^b