Individual logistic regression on RDI detectability of disks in DI-sNMF. The solid dots are for systems in Fig. 2. (a) Brighter host stars can likely yield disk detection. (b) Redder R_p – K band color potentially contribute to disk detection. (c) Brighter reference stars in K_s-band might tentatively contribute to disk detection. (d) Reference stars with fainter R_p magnitude of target stars might tentatively contribute to disk detection, however that is likely biased by the non-detections with R_p ≳ 11, see Fig. 3a. (e) Although reference at farther separation might yield better disk detection, this stems from a selection bias when close-in references are not available. Notes: (1) A joint multinomial logistic regression only preserves the trend for (a). (2) The trends here are subject to change due to the highly selected samples in this study. (3) From solid to dashed lines, the statistical significance decreases; dotted lines are biased trends that are not trustworthy.