Table 2.
Locations of matching search terms found in clinical notes during preoperative cannabis use search strategy of 1928 identified matches from 463 unique notes of 173 patients who had surgery at Shand's Hospital between 2018 and 2022 within 60 days of surgery, stratified by the assigned labels
| Note type | Total matches, n (%a) | Annotation labels assigned |
||||
|---|---|---|---|---|---|---|
| Not a true cannabis mention, n (%b) | True mention not reporting use status, n (%b) | Positive current use, n (%b) | Positive past use, n (%b) | Negative current use, n (%b) | ||
| Progress notes | 581 (30.13) | 142 (24.44) | 21 (3.61) | 302 (51.98) | 93 (16.01) | 23 (3.96) |
| Anesthesia preprocedure evaluation | 499 (25.88) | 47 (9.41) | 2 (.40) | 417 (83.75) | 0 (0) | 33 (6.61) |
| Letter | 236 (12.24) | 43 (18.22) | 9 (3.81) | 142 (60.17) | 34 (14.41) | 8 (3.39) |
| H&P | 96 (4.98) | 50 (52.08) | 0 (0) | 37 (38.54) | 9 (9.38) | 0 (0) |
| Telephone encounter | 89 (4.62) | 0 (0) | 87 (97.75) | 2 (2.25) | 0 (0) | 0 (0) |
| ED provider notes | 86 (4.46) | 20 (23.26) | 0 (0) | 38 (44.19) | 28 (32.56) | 0 (0) |
| H&P (view-only) | 86 (4.46) | 3 (3.49) | 0 (0) | 69 (80.23) | 14 (16.28) | 0 (0) |
| Discharge summary | 85 (4.41) | 55 (64.71) | 0 (0) | 28 (32.94) | 2 (2.35) | 0 (0) |
| Consults | 76 (3.94) | 32 (42.11) | 0 (0) | 12 (15.79) | 28 (36.84) | 4 (5.26) |
| Discharge instructions—AVS first page | 35 (1.82) | 33 (94.29) | 0 (0) | 2 (5.71) | 0 (0) | 0 (0) |
| IP AVS snapshot | 8 (0.41) | 0 (0) | 0 (0) | 8 (100) | 0 (0) | 0 (0) |
| Op note | 8 (0.41) | 4 (50.00) | 0 (0) | 4 (50.00) | 0 (0) | 0 (0) |
| Immediate post-operative note | 6 (0.31) | 6 (100) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| MR AVS snapshot | 6 (0.31) | 0 (0) | 0 (0) | 4 (66.67) | 0 (0) | 2 (33.33) |
| Patient care transfer note | 4 (0.21) | 3 (75.00) | 0 (0) | 1 (25.00) | 0 (0) | 0 (0) |
| Patient instructions | 4 (0.21) | 0 (0) | 4 (100) | 0 (0) | 0 (0) | 0 (0) |
| Post admission assessment | 4 (0.21) | 0 (0) | 0 (0) | 4 (100) | 0 (0) | 0 (0) |
| Sedation documentation | 4 (0.21) | 0 (0) | 0 (0) | 4 (100) | 0 (0) | 0 (0) |
| Interval H&P note | 3 (0.16) | 0 (0) | 0 (0) | 3 (100) | 0 (0) | 0 (0) |
| Not included in original source | 3 (0.16) | 0 (0) | 0 (0) | 3 (100) | 0 (0) | 0 (0) |
| ED AVS snapshot | 2 (0.10) | 0 (0) | 0 (0) | 2 (100) | 0 (0) | 0 (0) |
| ED notes | 2 (0.10) | 2 (100) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Nursing post-procedure note | 2 (0.10) | 0 (0) | 0 (0) | 2 (100) | 0 (0) | 0 (0) |
| Plan of care update | 2 (0.10) | 2 (100) | 0 (0) | 0 (0) | 0 (0) | 0 (0) |
| Outpatient student | 1 (0.05) | 0 (0) | 0 (0) | 1 (100) | 0 (0) | 0 (0) |
| Total | 1928 (100) | 442 (22.93) | 123 (6.38) | 1085 (56.28) | 208 (10.79) | 70 (3.63) |
AVS: after-visit summary; ED: emergency department; H&P: history and physical examination; IP: in-patient; op: operation; MR: medical record.
a
Column percent.
b
Row percent.