Skip to main content

Table 1 Descriptive statistics of the EMA constructs and questionnaires

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

Variables Data type N M SD Min. Max.
Active suicidal ideation EMA 437a 3.18 1.64 2.00 9.56
Passive suicidal ideation EMA 437a 4.53 2.37 2.00 10.00
Depression EMA 437a 5.90 2.03 2.00 10.00
Impulsivity-MIS Sum Score EMA 414a 8.18 2.83 4.00 18.00
MIS Item 1 EMA 414a 2.17 1.19 1.00 5.00
MIS Item 2 EMA 414a 1.50 0.97 1.00 5.00
MIS Item 3 EMA 414a 2.84 1.17 1.00 5.00
MIS Item 4 EMA 414a 1.68 0.99 1.00 5.00
DESC Questionnaire 73b 25.89 6.28 12.00 39.00
BSS Questionnaire 73b 9.22 9.01 0 29.00
SBQ-R Questionnaire 70b 10.30 3.39 1.00 18.00
  1. 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
  2. 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
  3. 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
  4. a N = number of observations
  5. b N = number of participants
  6. 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
Back to article page

BMC Psychiatry

ISSN: 1471-244X

Contact us