Table 1.
Characteristics of patients before and after PSM.
| Characteristics | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
| IVF group | IUI group | Standardized difference |
IVF group | IUI group | Standardized difference | |
| N | 278 | 189 | 168 | 168 | ||
| Female age (year) | 31.0 ± 2.6 | 30.7 ± 2.4 | 0.095 | 31.0 ± 2.5 | 30.9 ± 2.4 | -0.005 |
| infertility duration (year) | 3.94 ± 2.2 | 3.52 ± 2.13 | 0.190 | 3.72 ± 1.93 | 3.64 ± 2.20 | 0.034 |
| AMH (ng/mL) | 0.60 ± 0.33 | 0.86 ± 0.27 | -0.533 | 0.82 ± 0.28 | 0.83 ± 0.27 | -0.013 |
| BMI (kg/m2) | 21.3 ± 3.3 | 21.5 ± 3.1 | -0.067 | 21.4 ± 3.1 | 21.3 ± 2.8 | 0.024 |
| No. of previous deliveries | 0.10 ± 0.35 | 0.13 ± 0.35 | NA | 0.13 ± 0.37 | 0.13 ± 0.36 | NA |
| Male age (year) | 32.8 ± 3.5 | 32.6 ± 3.9 | NA | 32.9 ± 3.6 | 32.8 ± 3.8 | NA |
| AFC | 6.4 ± 2.6 | 7.9 ± 2.3 | NA | 7.0 ± 2.6 | 7.7 ± 2.2 | NA |
| Baseline FSH (IU/L) | 8.39 ± 4.65 | 6.84 ± 2.63 | NA | 7.65 ± 4.10 | 6.86 ± 2.64 | NA |
PSM for female age, infertility duration, AMH and BMI. NA, not applicable.