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Table 1 Clinical and laboratory data used to construct the FI-LAB

From: Standard laboratory tests to identify older adults at increased risk of death

Variablea Low cut-off High cut-off
Albumin (g/L) 32 45
AST (SGOT; IU/L) 8 33
BP, supine systolic (mmHg) 90 140
BP, supine diastolic (mmHg) 60 90
Calcium (mM) 2.3 2.7
Creatinine (μM) 53 106
Folate (nM) 11 57
Folate, RBC (nM) 376 1450
Glucose, fasting (mM) 3.9 6.1
Hemoglobin (g/L) b 135 180
Mean corpuscular volume (fL) 80 96
Phosphatase, alkaline (IU/L) 20 130
Phosphorus, inorganic (mM) 0.74 1.52
Potassium (mM) 3.8 5
Protein, total (g/L) 60 78
Sodium (mM) 136 142
TSH (μIU/L) 0.5 5
Thyroxine (T4; nM) 71 161
T4, Free (pM) 12 30
Urea (mM) 2.9 8.2
VDRL 0 0
Vitamin B12 (pg/L) 118 701
White blood cells (number/L) 1.8 × 109 7.8 × 109
  1. aNormal reference values for blood work were from Henry [18]. Reference values for normal blood pressure were from Jones et al. [19] and Pickering et al. [20]. bNote that normal references values for hemoglobin differed between the sexes so for women, the low cut-off was 120 g/L and the high cut-off was 160 g/L. AST, aspartate aminotransferase; BP, blood pressure; FI-LAB, Laboratory frailty indes; RBC, red blood cells; TSH, thyroid-stimulating hormone; VDRL, Venereal Disease Research Laboratory.