Table 3.

κ Coefficient for Each PHQ-9 Item by Groups Formed According to Administration Procedure Order and Administration Procedure

PHQ-9 Items	ST (n=118)	TS (n=113)	ST+TS (n=231)	TT (n=58)	SS (n=57)
PHQ1 (Little interest or pleasure in doing things)	0.71	0.48	0.60	0.83	0.70
PHQ2 (Feeling down, depressed, or hopeless)	0.78	0.68	0.73	0.78	0.83
PHQ3 (Trouble falling or staying asleep, or sleeping too much)	0.69	0.74	0.72	0.89	0.61
PHQ4 (Feeling tired or having little energy)	0.64	0.68	0.66	0.70	0.59
PHQ5 (Poor appetite or overeating)	0.60	0.58	0.59	0.73	0.74
PHQ6 (Feeling bad about yourself, or that you are a failure or have let yourself or your family down)	0.69	0.70	0.70	0.68	0.67
PHQ7 (Trouble concentrating on things, such as reading the newspaper or watching television)	0.63	0.56	0.60	0.80	0.79
PHQ8 (Moving or speaking so slowly that other people could have noticed, or the opposite, being so fidgety or restless that you have been moving around a lot more than usual)	0.63	0.52	0.58	0.72	0.63*
PHQ9 (Thoughts that you would be better off dead or hurting yourself in some way)	0.68	0.77	0.72	0.77*	0.57*

ST, self-administered/telephone-administered; TS, telephone-administered/self-administered; ST+TS, sum of the ST and TS groups; TT, telephone-administered/telephone-administered; SS, self-administered/self-administered; PHQ-9, Patient Health Questionnaire-9. Weights used for the κ analysis were: 1.0; 0.66; 0.33; and 0.0.

^*Except for these items, where weights were: 1.0; 0.50, and 0.0.