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Table 2 Normal ranges for serum activin A, B and follistatin

From: Serum activin A and B levels predict outcome in patients with acute respiratory failure: a prospective cohort study

Analyte Sex Age (years) Number Concentration (ng/mL) 95% CI
Activin A M/F 18 to 50 56 0.087 ± 0.004 0.080, 0.095
51 to 65 52 0.110 ± 0.005 0.099, 0.120
66+ 30 0.150 ± 0.009 0.130, 0.170
Activin B F 18 to 50 29 0.085 ± 0.005 0.074, 0.096
51 to 65 31 0.062 ± 0.005 0.051, 0.073
66+ 20 0.071 ± 0.005 0.060, 0.082
Activin B M 18 to 50 27 0.061 ± 0.004 0.053, 0.069
51 to 65 21 0.064 ± 0.005 0.053, 0.074
66+ 10 0.086 ± 0.008 0.069, 0.100
Follistatin M/F 18 to 50 56 11.67 ± 0.63 10.40, 12.94
51 to 65 52 12.61 ± 0.58 11.44, 13.78
66+ 30 14.36 ± 0.71 12.90, 15.82
  1. Reference ranges for activin A, activin B and follistatin, presented as mean ± standard error of the mean concentrations and 95% CI M, male; F, female.