Variable | Category I and II a (n = 98) | Category III b (n = 30) | P value |
---|---|---|---|
First-pass success rate c | 84 (86%) | 12 (40%) | <0.001 |
First-attempt success rate d | 97 (99%) | 25 (83%) | 0.003 |
Overall success rate | 98 (100%) | 28 (93%) | 0.054 |
Needling time, seconds e | 57 [44–77] | 156 [61–245] | <0.001 |
Number of needle passes | 1 [1–1] | 2 [1–3] | <0.001 |
Number of attempts | 1 [1–1] | 1 [1–1] | 0.011 |