Table 2 Overview of the computed patient characteristic distributions from our EHR structured data in comparison to the original study
From: Feasibility analysis of conducting observational studies with the electronic health record
DPS study | |||||
Patient characteristics | Publication (P) | EHR (E) | |||
DP: 1956–2006 (50 years) n = 2919 | DP: Nov 1999 – Sep 2016 (17 years) n = 411 | ||||
Demography | Sex | Male, n (%) | 2579 (88.4) | 327 (79.6) | |
Female, n (%) | 340 (11.6) | 84 (20.4) | |||
Mean age | Male, years | 57.62 | 61.39 | ||
Female, years | 62.62 | 64.57 | |||
Complications | Nerve injury, n (%) | 108 (3.7) | 3 (0.73) | ||
Tendon injury, n (%) | 5 (0.2) | 2 (0.49) | |||
Skin necrosis, n (%) | 76 (2.6) | 0 (0) | |||
Infection, n (%) | 94 (3.2) | 1 (0.24) | |||
Bleeding, n (%) | 35 (1.2) | 7 (1.7) | |||
Comorbidities | Diabetes mellitus, n (%) | 306 (10.5) | 25 (6.1) | ||
Epilepsy, n (%) | 39 (1.3) | 5 (1.2) | |||
DP: 1988–2006 (18 years) n = 1119 | DP: Nov 1999 – Sep 2016 (17 years) n = 411 | ||||
Demography | Sex | Male, n (%) | 977 (87.3) | 327 (79.6) | |
Female, n (%) | 142 (12.7) | 84 (20.4) | |||
Affected digit/s | One digit, n (%) | 505 (45.1) | 100 (24.3) | ||
More than one digit, n (%) | 614 (54.9) | 263 (64) | |||
Operation technique | Limited fasciectomy, n (%) | 1061 (94.8) | 5 (1.2) | ||
Total fasciectomy, n (%) | 58 (5.2) | 0 (0) | |||
Additional amputation, n (%) | 13 (1.2) | 2 (0.5) | |||
Recurrence, n (%) | 145 (13) | 67 (16.3) | |||
Lifestyle | Smoking, n (%) | 185 (16.5) | 11 (2.7) | ||
Alcohol, n (%) | 236 (21.1) | 4 (1) | |||
Both, n (%) | 76 (6.8) | 0 (0) | |||
Simultaneous operations | Carpal tunnel, n (%) | 14 (1.3) | 33 (8.0) | ||
Trigger finger, n (%) | 26 (2.3) | 44 (10.7) | |||
DG study | |||||
Patient characteristics | Publication (P) | EHR (E) | |||
DP: Jan 2002 – Dec 2011 (9 years) n = 368 | DP: Dec 2000 – Sep 2016 (15 years) n = 423 | ||||
Demography | Sex | Male, n (%) | 269 (73.1) | 297 (70.2) | |
Female, n (%) | 99 (26.9) | 126 (29.8) | |||
Mean Age | Total, years (range) | 61.3 (21–94) | 62.5 (19–96) | ||
Balloon Dilatation, years | 61.8 | 57.7 | |||
Bougination, years | 63.4 | 63.5 | |||
Balloon dilatation, Bougination | Patient with balloon dilatation, n (%) | 68 (18.5) | 69 (16.3) | ||
Patient with bougination, n (%) | 300 (81.5) | 354 (83.7) | |||
Sessions of balloon dilatation, n | 211 | 136 | |||
Sessions of bougination, n | 1286 | 1281 | |||
Total sessions, n | 1497 (4.07 per patient) | 1417 (3.35 per patient) | |||
Perforation | Balloon dilatations, n | 0 | 0 | ||
Bougination, n | 8 | 5 | |||
Occurence, n | During first session: 4 During second session: 4 | During first session: 3 During second session: 1 During later sessions: 1 | |||
Detection, n | During procedure: 4 After procedure: 4 | No specification: 5 | |||
Rate per procedure, % | 0.53 | 0.35 | |||
Rate per patient, % | 2.17 | 1.18 | |||
Death, n | 1 | 0 | |||
Length of hospital stay | With perforation, days (range) | 21.3 (9–41) | 19.2 (4–36) | ||
Without perforation, days (range) | 6.8 (2–13) | 9.1 (1–80) | |||
DRO Study | |||||
Patient characteristics | Publication (P) | EHR (E) | |||
DP: unknown Gemcitabine and cisplatin n = 58 | DP: Jan 2008 – May 2015 Gemcitabine and cisplatin n = 13 | ||||
Demography | Sex | Male, n (%) | 36 (62) | 10 (76.9) | |
Female, n (%) | 22 (38) | 3 (23.1) | |||
Mean Age, years | 63 | 60.5 | |||
Tumor | Location | Head, n (%) | 40 (69) | 6 (46.2) | 3 (23.1) (no specification) |
Body, n (%) | 9 (16) | 1 (7.7) | |||
Tail, n (%) | 1 (2) | 0 (0) | |||
Head body, n (%) | 5(9) | 3 (23.1) | |||
Body tail, n (%) | 3 (5) | ||||
Diagnosed by | Biopsy, n (%) | 41 (71) | 1 (7.7) | ||
Operation, n (%) | 15 (29) | 0 (0) | |||
Median Duration | Radiotherapy, days | 42 | 42 | ||
Survival | Alive at analysis, n | 2 | 10 | ||