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Balloon Expulsion Test Before and After Treatment
| Experiment group (n = 38) | Control group (n = 36) | χ2 | P | ||
|---|---|---|---|---|---|
| Pre-treatment | 0.170 | 0.680 | |||
| Failure of expulsion | 26 (68.4%) | 23 (63.9%) | |||
| Success of expulsion | 12 (31.6%) | 13 (36.1%) | |||
| Post-treatment | 5.845 | 0.016 | |||
| Failure of expulsion | 7 (18.4%) | 16 (44.4%) | |||
| Success of expulsion | 31 (81.6%) | 20 (55.6%) |
