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Table 1 Study descriptions and detailed overview of investigated outcome and exposure variables from Fig. 1

From: Feasibility analysis of conducting observational studies with the electronic health record

1. DPS study Exposure A C Outcome A C
Assessing the relationship between typical risk factors and the severity of Dupuytren’s contracture
N = 411
 
Comorbidities Epilepsy
Diabetes mellitus
X Classifications Iselin X
Lifestyle Alcohol
Smoking
X
  Demography Sex X Classifications Iselin at initial or recurrent diagnosis of Dupuytren’s contracture X
Demography Mean age at initial or recurrent diagnosis of Dupuytren’s contracture X
  Classifications Iselin (stage of Dupuytren’s contracture) X Complications Postoperative Intraoperative X X
2. DG study Exposure A C Outcome A C
Perforation numbers after endoscopic esophageal balloon dilatation and
bougination
N = 423
Perforation Perforation
No Perforation
X Length of hospital stay X
3. DRO study Exposure A C/R Outcome A C/R
Comparison of two radiochemotherapies protocols in locally advanced pancreatic cancer
N = 13
Radiotherapy
Chemotherapy
Radiotherapy +
Gemcitabine and cisplatin
X X Classifications Common toxicity criteria
Radiotherapy +
5-Fluororuacil and mitomycin C
Death X
  Additive chemotherapy X X Death X
  1. “X” = available, “-” = unavailable, A: Administrative data (structured data), C: Clinical data (structured and unstructured data), R: Registry data (structured data)