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. 2016 May 6;14:72. doi: 10.1186/s12955-016-0475-x

Fig. 2.

Fig. 2

Information curves for the full item bank and for the two QLQ-C30 RF items only, respectively. The RF scores obtained if answering “not at all”, “a little”, “quite a bit”, or “very much”, respectively to all 10 items are indicated at the horizontal axis. Theta scores were estimated using EAP