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Table 1 Demographic characteristics of inguinal hernia cases

From: The incidence and analysis of ipsilateral occult hernia in patients undergoing hernia repair: a single institution retrospective study of 1066 patients

Variable Occult hernia Non-occult hernia Total
Patients, n 88* 978 1066
Sex, n
 Male 81 893 974
 Female 7 85 92
Ages, years 71.68 ± 11.31 (46–95) 66.22 ± 15.73 (13–98)  
Types of hernia, n 91 1053 1144**
 Indirect hernia 28 829 857
 Direct hernia 47 183 230
 Femoral hernia 14 40 54
 Obturator hernia 1 1 2
 Spiglian hernia 1 0 1
Operation methods, n 88 978 1066
 Endoscopic technique 27 334 361
 Open surgery 61 644 705
Operators qualification, n 88 978 1066
 EHS group 67 687 754
 NEHS group 21 291 312
Location of inguinal hernia, n 88* 978 1066
 Left groin 32 383 415
 Right groin 56 510 566
 Bilateral groin 0 85 85
  1. Values are expressed as the mean ± standard deviation of the mean
  2. EHS expert hernia surgeons, NEHS Non-expert hernia surgeons
  3. *Three cases among 88 patients who suffered two kinds of occult hernias on the same side. **Different hernias on both sides of the same patient were counted, so the total number of types of hernia (n = 1144) exceeds the total number of patients (n = 1066)