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Relationship of age, PI-LL at last follow-up and S1 screw loosening
| A | |||
|---|---|---|---|
| Age<65 years old | Age ≥ 65 years old | P value | |
| S1 screw loosening rate | 46.9%(15/47) | 53.1%(17/31) | 0.044 |
| B | |||
| PI-LL < 10 at last follow-up | PI-LL ≥ 10 at last follow-up | P value | |
| S1 screw loosening rate | 28.1%(9/24) | 71.9%(23/54) | 0.673 |
