Article Figures & Data
Figures
- Figure 1.
Cohorts included in the current study. From the original cohort of 61,464 patients with a new diagnosis of depression from 14 practices, a cohort of 32,385 patients with a new episode of depression was available from a subset of 8 practices willing to provide history of present illness (HPI) data for this study. From this cohort, we identified 15,761 patients with HPI data that was processed through a natural language processing algorithm (HPI subset); 1,013 patients with the 9th item from the 9-item Patient Health Questionnaire (PHQ-9) recorded in their electronic health record (PHQ-9 subset); 16,289 patients with HPI data or PHQ-9 item 9 data (HPI or PHQ-9 subset); and 485 patients with both HPI and PHQ-9 data (both HPI and PHQ-9 subset).
Tables
- Table 1. Demographic Characteristics of Patients Included in the Overall Cohort and the 4 Subsets (1998 to 2011)
Characteristics Overall Cohort (n = 32,385) HPI Subset (n = 15,761) PHQ-9 Subset (n = 1,013) HPI or PHQ-9 Subset (n = 16,289) Both HPI & PHQ-9 Subset (n = 485) Female sex 68 67 67 67 67 Age (years), mean (median), range 61 (65), 13–98 60.4 (63), 13–98 54.2 (55), 15–96 60.2 (17.9), 13–98 53.1 (53), 15–94 Age group Adolescent (13–18 years old) 1.1 1.1 0.7 1.1 1.2 Adult (19–64 years old) 48.4 50.5 68.7 51.1 69.3 Older adult (≥65 years old) 50.5 48.4 30.6. 47.8 29.5 Data are percentages unless otherwise indicated.
HPI, history of present illness; PHQ-9, 9-item Patient Health Questionnaire.
- Table 2. Concordance Between Indications of Suicidal Ideation According to the Specified Source* and Indications According to International Classification of Diseases, 9th Revision, Codes
HPI (n = 15,761) PHQ-9 (n = 1,013) HPI or PHQ-9 (n = 16,289) Both HPI and PHQ-9 (n = 485) Suicidal ideation indicated by specified source 1,025 (6.5) 85 (8.4) 1,098 (6.7) 12 (2.5) Corresponding ICD-9 code included 30 (3) 4 (5) 34 (3.1) 0 (0) κ Statistic 0.036 0.068 0.04 — Data are n (%).
↵* Source corresponds to the column headings: history of present illness [HPI] notes field; item 9 of the 9-item Patient Health Questionnaire [PHQ-9]; HPI notes field or PHQ-9 item 9; both the HPI notes field and PHQ-9 item 9.
ICD-9, International Classification of Diseases, 9th Revision.
