Sleep disturbances predict active suicidal ideation the next day: an ecological momentary assessment study

Table 1 Descriptive statistics of the EMA constructs and questionnaires

Variables	Data type	N	M	SD	Min.	Max.
Active suicidal ideation	EMA	437^a	3.18	1.64	2.00	9.56
Passive suicidal ideation	EMA	437^a	4.53	2.37	2.00	10.00
Depression	EMA	437^a	5.90	2.03	2.00	10.00
Impulsivity-MIS Sum Score	EMA	414^a	8.18	2.83	4.00	18.00
MIS Item 1	EMA	414^a	2.17	1.19	1.00	5.00
MIS Item 2	EMA	414^a	1.50	0.97	1.00	5.00
MIS Item 3	EMA	414^a	2.84	1.17	1.00	5.00
MIS Item 4	EMA	414^a	1.68	0.99	1.00	5.00
DESC	Questionnaire	73^b	25.89	6.28	12.00	39.00
BSS	Questionnaire	73^b	9.22	9.01	0	29.00
SBQ-R	Questionnaire	70^b	10.30	3.39	1.00	18.00

Notes. EMA active and passive suicidal ideation, and EMA depression were measured with two items resulting in a sum score from 2 to 10 for each variable; EMA state impulsivity was measured with four items resulting in a sum score from 4 to 20
Baseline depression (DESC) was measured with ten items resulting in a sum score from 0 to 40; baseline suicidal ideation (BSS) was measured with 21 items resulting in a sum score from 0 to 38; baseline suicidal behavior (SBQ-R) was measured with four items resulting in a sum score from 3 to 18
The means of the EMA variables represent the average of the possible 438 (73 persons * 6 days of EMA) daily means (observations) and the EMA minimum and maximum values represent the range of the daily means
^a N = number of observations
^b N = number of participants
Abbreviations: EMA ecological momentary assessments, M mean, SD standard deviation, min minimum value, max maximum value, MIS Momentory Impusivity scale, DESC Rasch-based depression screening, BSS Beck scale for suicide ideation, SBQ-R suicide behaviors questionnaire-revised