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. 2022 Jun 22;22:512. doi: 10.1186/s12877-022-03198-x

Table 4.

Inter-item correlation of OPQoL-brief items

	I1	I2i	3i	4i	I5	I6	I7	I8	I9	I10	I11	I12
I1	1.000
I2	0.672^a	1.000
I3	0.507^a	0.495^a	1.000
I4	0.333^a	0.353^a	0.408^a	1.000
I5	0.625^a	0.623^a	0.530^a	0.449^a	1.000
I6	0.495^a	0.555^a	0.455^a	0.385^a	0.616^a	1.000
I7	0.515^a	0.516^a	0.665^a	0.401^a	0.530^a	0.566^a	1.000
I8	0.601^a	0.610^a	0.498^a	0.424^a	0.634^a	0.610^a	0.603^a	1.000
I9	0.384^a	0.406^a	0.394^a	0.392^a	0.447^a	0.435^a	0.447^a	0.517^a	1.000
I10	0.454^a	0.479^a	0.404^a	0.480^a	0.516^a	0.476^a	0.467^a	0.600^a	0.641^a	1.000
I11	0.515^a	0.516^a	0.450^a	0.558^a	0.552^a	0.526^a	0.518^a	0.595^a	0.508^a	0.641^a	1.000
I12	0.583^a	0.553^a	0.448^a	0.402^a	0.577^a	0.492^a	0.488^a	0.589^a	0.501^a	0.548^a	0.619^a	1.000
I13	0.372^a	0.351^a	0.393^a	0.369^a	0.369^a	0.392^a	0.451^a	0.417^a	0.418^a	0.466^a	0.454^a	0.500^a

^aCorrelation is significant at the 0.01 level