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Table 1 Demographic and clinical characteristics of the patients

From: Serum α-klotho concentrations during preimplantation can predict aging or quality of human oocytes and clinical pregnancy rates

Characteristics Value
No. patients 633
Mean maternal age (range) (years) 36.84 (30–45)
Race—no. (%)
 Asian 443 (70 %)
 White 178 (28.1 %)
 Black 12 (1.9 %)
Current smoker—no. (%) 0 (0 %)
Intracytoplasmic sperm injection (ICSI) (%) 633 (100 %)
Mean serum alpha-klotho concentrations (pg/mL) (range) 593.14 (123.77–1227.1)
Mean maturation rate (range) (%) 39.8 (0–100)
Mean fertilization rate (range) (%) 37.9 (0–100)
Pregnancy rate (%) 33
Mean body mass index (BMI) 21.4 (16.9–31.6)
Mean serum 25 (OH) D levels (nmol/L) (range) 74.8 (30–144)