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Clinical Chemistry 51: 1830-1835, 2005; 10.1373/clinchem.2005.053595
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Table 1. hCG concentration ranges and the 97.5 percentile values for the nonpregnant cohorts in the study.

Nonpregnant cohort n hCG range, IU/L 97.5 percentile, IU/L P
Premenopausal, 18–40 years 240 <2.0 to 4.6 2.5
Perimenopausal, 41–55 years 240 <2.0 to 7.7 4.8 0.071
Postmenopausal, >55 years 240 <2.0 to 13.1 7.7 <0.00012

1 Compared with the nonpregnant premenopausal cohort.

2 Compared with the nonpregnant premenopausal and nonpregnant perimenopausal cohorts.





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