Table 1.

Baseline characteristics of patients with NOA in the two datasets

	Development set	Validation set
N, subjects	558	695
FSH (mIU/ml)	18.6 (17.1) [0.6–127]	19.1 (15.6) [0.6–127]
Testis volume (ml)	7.2 (5) [0.9–21.3]	7.3 (5) [0.9–21.3]
Testis histology patterns
Sertoly-only syndrome	301 (53.9%)	389 (56%)
Focal SCO	75 (13.4%)	83 (11.9%)
Maturative arrest	72 (12.9%)	88 (12.7%)
Hypospermatogenesis	110 (19.7%)	135 (19.4%)

Data are expressed as median (IQR) with range in squared brackets, or as count with percentages in parentheses