Skip to main content

Table 1 Number of total, surveyed, and responded departments, and estimated number of patients

From: Congenital limb deficiency in Japan: a cross-sectional nationwide survey on its epidemiology

Strata Total Number of Departments Number of Surveyed Departments Sampling rate (%) Number of Responded Departments Response Rate (%) Estimated Number of Patients 95% Confidence Interval
First Survey
Orthopedic surgery
 University hospital 133 133 100.0 120 90.2 104 87 121
 General hospital          
  500 beds 201 201 100.0 155 77.1 25 16 33
  400–499 beds 213 170 79.8 135 79.4 0 0 0
  300–399 beds 343 137 39.9 104 75.9 7 0 14
  200–299 beds 391 79 20.2 59 74.7 0 0 0
  100–199 beds 1006 100 9.9 75 75.0 40 0 96
  99 beds 1950 96 4.9 64 66.7 0 0 0
 Special stratum 79 79 100.0 65 82.3 290 230 351
Subtotal 4316 995 23.1 777 78.1 466 381 551
Pediatrics
 University hospital 125 125 100.0 106 84.8 24 18 29
 General hospital
  500 beds 189 189 100.0 152 80.4 25 18 31
  400–499 beds 193 154 79.8 128 83.1 8 3 12
  300–399 beds 302 121 40.1 93 76.9 97 0 230
  200–299 beds 297 60 20.2 51 85.0 12 0 26
  100–199 beds 486 48 9.9 33 68.8 0 0 0
  99 beds 786 39 5.0 29 74.4 0 0 0
 Special stratum 76 76 100.0 50 65.8 15 6 25
Subtotal 2454 812 33.1 642 79.1 180 47 314
Plastic surgery
 University hospital 89 89 100.0 68 76.4 47 35 60
 General hospital
  500 beds 157 157 100.0 107 68.2 129 6 252
  400–499 beds 125 100 80.0 75 75.0 30 10 50
  300–399 beds 127 52 40.9 38 73.1 7 0 14
  200–299 beds 126 25 19.8 20 80.0 0 0 0
  100–199 beds 186 19 10.2 13 68.4 0 0 0
  99 beds 222 11 5.0 8 72.7 0 0 0
 Special stratum 19 19 100.0 15 78.9 46 28 63
Subtotal 1051 472 44.9 344 72.9 259 132 385
Other special stratum 4 4 100.0 4 100.0 179 179 179
Total 7825 2283 29.2 1767 77.4 1084 881 1287
Total (per year)       542 441 643
Second Survey
Total (per year) a 417 339 495
Total (per 10,000 live births) b 4.15 3.37 4.93
  1. aThe estimated number of patients and 95% confidence interval was corrected with ineligible rate and duplication rate
  2. bWe estimated with the assumption that the number of live birth was 1.005million