Comparison of bone mineral density and influencing factors in iatrogenic and idiopathic POI
Bibliographic record
Abstract
Objective This study aimed to investigate the characteristics of bone mineral density (BMD) in patients with premature ovarian insufficiency (POI), compare BMD between iatrogenic POI and idiopathic POI patients, and investigate the factors affecting BMD in POI patients.Method This cross-sectional study recruited a total of 88 iatrogenic POI patients, 45 idiopathic POI patients and 45 normal reproductive-age women, all of whom met the study criteria and were treated at the Department of Gynecological Endocrinology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University from 1 January 2023 to 30 June 2024. Medical history was collected for all patients, and follicle stimulating hormone (FSH), estradiol (E2), total testosterone (TT), free testosterone (FT), biologically active testosterone (BioT), dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulfate (DHEAS) were measured. Height and weight were measured, and the body mass index (BMI) was calculated. BMD of the lumbar spine and left femur was measured in POI patients. Multiple linear regression analyses were performed to determine the correlation between characteristics and BMD.Results The incidence of osteoporosis was significantly higher in iatrogenic POI patients than in idiopathic POI patients (40.9% vs. 20.0%, p < 0.05). The femoral shaft BMD, greater trochanter BMD t-score, total femoral BMD and total femoral BMD t-score were significantly lower in iatrogenic POI patients compared to idiopathic POI patients (all p < 0.05). Multiple linear regression analysis revealed that delay in diagnosis negatively affected the lumbar BMD t-score (p < 0.05) and the BMI and DHEAS positively affected the total femur BMD t-score in iatrogenic POI patients (p < 0.05). No significant correlations were found in idiopathic POI patients.Conclusion The incidence of osteopenia and osteoporosis in POI patients is high, especially in iatrogenic POI patients, who experience more severe bone loss and a higher incidence of osteoporosis. BMI and a delay in diagnosis significantly affected BMD in iatrogenic POI patients. This, to our knowledge, is the first study showing that DHEAS positively affects BMD in iatrogenic POI patients, which, however, needs further studies for confirmation.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".