“Psychometric properties of the Norwegian foot function index revised short form”

Table 4 Results for testing of the construct validity of the FFI-RSN

	Spearman’s correlation coefficient FFI-RSN	P value	Predefined hypothesis	Hypothesis verified
Rand-12 PCS12	−0.74^a	≤ 0.001	−0.4- - 0.6 (mod. Neg. cor.)	no
Rand-12 MCS12	−0.58^a	≤ 0.001	−0.4- - 0.6 (mod. Neg. cor.)	yes
NRS pain activity	0.60^a	≤ 0.001	0.4–0.6 (mod. Pos. cor.)	yes

^a Correlation is significant at the 0.01 level (2-tailed). FFI-RSN: Norwegian version of Foot Function Index revised short form. RAND12 Rand-12 Health Status Inventory, PCS12 Physical Component Score, MCS12 Mental Component Score, NRS Numeric Rating Scale, mod. Neg. cor.: moderate negative correlation, mod. Pos. cor.: moderate positive correlation

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