Statistical comparison of labour analgesia rates between period A and B
| Labour analgesia | ||
| Period A | Period B | |
| Mean (%) | 9.3707 | 17.0981 |
| Median (%) | 9.3700 | 16.47 |
| Variance (%) | 15.1226 | 34.4926 |
| Standard deviation (%) | 3.8887 | 5.873 |
| Observations | 31 | 31 |
| T-test | P<0.01 | |