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 | |||||