Table 1. Summary Statistics for Adolescent Patient Accounts.
| Variable | No. (%) | ||
|---|---|---|---|
| Nationwide Children’s Hospital | Rady Children’s Hospital | Stanford Children’s Health | |
| Total adolescent accounts | 1313 | 5452 | 2312 |
| Eligible accounts (with ≥1 outbound message) | 949 (72) | 1780 (33) | 700 (30) |
| Proxy account registered | |||
| Yes | 67 (7) | 5 (0.3) | 67 (10) |
| No | 882 (93) | 1775 (99.7) | 633 (90) |
| Outbound messages | |||
| Total | 6364 | 13 841 | 5437 |
| Flagged by NLP | 2691 (42) | 3941 (28) | 1646 (30) |
| NLP-flagged accounts (accounts with ≥1 NLP-flagged message) | 544 (57) | 948 (53) | 364 (52) |
| Age at the time of message, median (IQR), y | 15.2 (14.1-16.2) | 15.8 (14.8-16.9) | 15.5 (14.3-16.4) |
| Sex | |||
| Female | 340 (36) | 791 (44) | 397 (57) |
| Male | 609 (64) | 989 (56) | 303 (43) |
| Race and ethnicitya | |||
| Asian/Pacific Islander | 21 (2) | 104 (6) | 119 (17) |
| Black/African American | 114 (12) | 38 (2) | 4 (.6) |
| Hispanic | 30 (3) | 441 (25) | 94 (13) |
| Native American | 1 (0.1) | 0 | 2 (.3) |
| Otherb | 62 (7) | 281 (16) | 223 (32) |
| White Non-Hispanic | 721 (76) | 916 (51) | 258 (37) |
Abbreviations: IQR, interquartile range; NLP, natural language processing.
a
Based on self-reported data documented in the electronic health record.
b
Other refers to 1 of these 3 categories documented in the electronic health record: unknown, declined to state, or other.