Table 4. Delay from the onset of symptom to hyperbaric treatment and the corresponding success rate of recompression therapy.
| Delay (h) | Case (n) | Complete Recovery* [n (%)] | Incomplete Recovery [n (%)] | Effectiveness [n (%)] |
| 1–6 | 2,5591 | 2,401 (93.8%) | 135 (5.3%) | 2,536 (99.1%)3 |
| 6–12 | 1,8022 | 1,579 (87.6%) | 216 (12.0%) | 1,795 (99.6%)4 |
| 12–24 | 555 | 473 (85.2%) | 80 (14.4%) | 553 (99.6%) |
| 24–36 | 234 | 189 (80.8%) | 43 (18.4%) | 232 (99.1%) |
| >36 | 119 | 90 (75.6%) | 29 (24.4%) | 119 (99.2%) |
| Total | 5,269 | 4,732 (89.8%) | 502 (9.5%) | 5,234 (99.3%) |
Note: Eight (note 1) and 1 (note 2) cases died before recompression were not included. Twenty-two (note 3) and 2 (note 4) death cases were in these two categories of delay, respectively. Effectiveness is the sum of the rate of complete and incomplete.
*
Chi-square test showed that the complete recovery rate decreased significantly with the increase of the delay (χ 2 = 114.27, P<0.0001).