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Table 1 Human female serum FSH (IU/L): assay summary statistics after less than 12 months frozen storage (short term and intermediate storage times)

From: Inter-laboratory validation of the measurement of follicle stimulating hormone (FSH) after various lengths of frozen storage

Labstorage time Mean (SD) Median (SE) Min, Max Q25, Q75
Lab A0 days 7.31 (3.29) 7.60 (0.85) 2.20, 14.50 5.15, 9.05
Lab A45 days 7.00 (3.02) 7.40 (0.78) 2.10, 12.90 4.70, 8.90
Lab B45 days 6.07 (2.57) 6.47 (0.66) 1.95, 10.53 4.20, 6.72
Lab C 45 days 7.29 (3.01) 7.92 (0.78) 2.18, 12.80 5.00, 9.12
Lab B10.5 months 6.33 (2.79) 6.60 (0.72) 2.10, 11.40 4.55, 7.05
Lab C10.5 months 7.29 (2.96) 7.79 (0.76) 2.31, 12.00 4.95, 9.22
  1. n = 15 samples
  2. SD standard deviation, SE standard error, MIN minimum value, MAX maximum value, Q25 25th percentile, Q75 75th percentile.