Clinical Chemistry -- Snyder et al. 51 (10): 1830 Table 1

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.