GAD1 and Anxiety: Missing or inconsistent users (n=68; Table S1 in Multimedia Appendix 1) in the communication apps were not significantly different from the active users (n=74) in anxiety, stress, or trauma-related disorder diagnoses (P=.50), age (P=.41), cohabitation status (P=.36), employment status (P=.29), or GAD-7 (P=.34).