Table 2:
Reproductive and Fracture History
| CONTROL N=40 | ALL IOP N=78 | p* All IOP vs Controls | AMONG ALL IOP | |||
|---|---|---|---|---|---|---|
| PLO N=15 | IOP (nonPLO) N=63 | p* PLO vs IOP | ||||
| Reproductive History | ||||||
| Age at menarche | 12.6 ± 1.2 | 12.8 ± 1.2 | 0.4 | 12.6 ± 1.5 | 12.9 ± 1.2 | 0.4 |
| Parity | 1.4 ± 1.2 | 1.4 ± 1.2 | 0.9 | 1.7 ± 0.8 | 1.3 ± 1.2 | 0.3 |
| % Parous | 27/40=68% | 53/78=68% | 0.96 | 15/15=100% | 38/63 = 60% | NA |
| Reproductive History Among Parous Subjects Only | ||||||
| Age at First Pregnancy | 26 ± 6 | 27 ± 6 | 0.9 | 28 ± 4 | 26 ± 6 | 0.2 |
| % Ever Breastfed | 89% | 79% | 0.3 | 100% | 71% | 0.02 |
| Fracture History | ||||||
| Number of Fractures | NA | 3.2 ± 2.6 | NA | 5.5 ± 3.3 | 2.6 ± 2.1 | 0.005 |
| Vertebral Fractures | NA | 29% | NA | 80% | 17% | <0.0001 |
| History of Multiple Fractures | NA | 72% | NA | 100% | 65% | 0.007 |
| History of Childhood Fractures | 18% | 41% | 0.01 | 60% | 37% | 0.1 |
| Family History of Osteoporosis | 50% | 58% | 0.4 | 53% | 59% | 0.7 |
*
T-tests utilized for comparisons between groups for continuous variables. Chi-square statistic utilized for categorical variables.