Table 2.
Measurand | Units | n | Mean | SD | Median | Min | Max | p-valuea | Distributiona | Methodb | LRL of RIb | URL of RIb | CI 90% of LRLb | CI 90% of URLb |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total protein | g/dL | 161 | 4.48 | 1.38 | 4 | 1.4 | 9.8 | <0.001 | NG | NP | 2.4 | 7.4 | 1.4–2.6 | 7.0–9.8 |
Albumin to globulin ratio | 163 | 1.2 | 0.33 | 1.2 | 0.45 | 1.98 | 0.29 | NG | NP | 0.6 | 1.8 | 0.5–0.7 | 1.7–2.0 | |
Prealbumin | % | 159 | 7.6 | 4.3 | 6.8 | 0.3 | 22.4 | <0.001 | NG | NP | 0.4 | 18.3 | 0.3–0.5 | 16.2–22.4 |
g/dL | 159 | 0.34 | 0.22 | 0.29 | 0.01 | 1.1 | <0.001 | NG | NP | 0.02 | 0.9 | 0.01–0.02 | 0.82–1.10 | |
Albumin | % | 163 | 44 | 7.1 | 45.1 | 25.4 | 59.1 | 0.004 | NG | NP | 28.5 | 55.9 | 25.4–31.5 | 53.7–59.1 |
g/dL | 162 | 2 | 0.6 | 1.9 | 0.6 | 4.2 | <0.001 | NG | NP | 0.8 | 3.7 | 0.6–1.1 | 3.3–4.2 | |
α-1 globulins | % | 161 | 6.5 | 1.9 | 6.2 | 3 | 12.7 | <0.001 | NG | NP | 3.4 | 11.9 | 3.0–4.0 | 10.7–12.7 |
g/dL | 162 | 0.3 | 0.14 | 0.26 | 0.07 | 0.89 | <0.001 | NG | NP | 0.1 | 0.7 | 0.07–0.15 | 0.56–0.89 | |
α-2 globulins | % | 157 | 15.6 | 2.9 | 15.2 | 11.1 | 25.9 | <0.001 | NG | NP | 11.5 | 24.9 | 11.1–12.3 | 23.4–25.9 |
g/dL | 161 | 0.74 | 0.3 | 0.64 | 0.21 | 1.95 | <0.001 | NG | NP | 0.35 | 1.6 | 0.21–0.40 | 1.30–1.95 | |
β-globulins | % | 163 | 15.8 | 4.1 | 15 | 8.7 | 30.6 | <0.001 | NG | NP | 9.7 | 26.6 | 8.7–10.2 | 23.6–30.6 |
g/dL | 157 | 0.69 | 0.27 | 0.64 | 0.23 | 1.73 | <0.001 | NG | NP | 0.3 | 1.5 | 0.23–0.34 | 1.11–1.73 | |
γ-globulins | % | 163 | 7.9 | 2.2 | 7.8 | 3.1 | 14.9 | 0.08 | NG | NP | 3.8 | 13.3 | 3.1–4.4 | 12.0–14.9 |
g/dL | 161 | 0.36 | 0.16 | 0.34 | 0.1 | 0.99 | <0.001 | NG | NP | 0.1 | 0.8 | 0.10–0.16 | 0.67–0.99 | |
Serum amyloid A (SAA) | mg/L | 143 | 1.24 | 1.99 | 0.1 | <0.1 | 10.08 | <0.001 | NG | NP | <0.1 | 6.7 | 0.1–0.1 | 5.9–10.1 |
Haptoglobin (HP) | mg/mL | 141 | 0.07 | 0.15 | 0.01 | <0.01 | 0.27 | <0.001 | NG | NP | <0.01 | 0.23 | 0.01–0.01 | 0.19–0.27 |
aThe Shapiro–Wilk test was used to assess normality of the distributions at a threshold of p < 0.3. NG, Non-Gaussian. bOutliers were identified by Tukey interquartile fences and removed. The nonparametric (NP) method was used to generate reference intervals (RI), containing the central 95%. LRL, Lower reference limit; URL, Upper reference limit; CI, Confidence interval; SD, Standard deviation.