Table 2

 Biochemical composition of sputum obtained from clinical responders and non-responders

Responders(n = 13)Non-responders(n = 9)p value*
Values shown as median (interquartile range).
*Two tailed Mann-Whitney test.
Calcium (mM)3.0 (2.4–3.6)3.0 (2.6–3.4)0.815
Chloride (mM)75 (67–87)75 (70–96)0.920
Bicarbonate (mM)12.5 (5.7–18.5)8.9 (5.1–11.9)0.133
Inorganic phosphate (mM)14.2 (7.6–24.4)12.0 (7.6–12.6)0.135
Magnesium (mM)2.0 (1.5–2.6)1.3 (1.1–1.5)0.020
Potassium (mM)21.9 (19.4–23.7)18.1 (16.0–19.3)0.016
Sodium (mM)85 (80–104)92 (81–106)0.894
Osmolality (mosmol/kg)258 (235–292)228 (222–250)0.057
DNA (mg/ml)3.2 (1.8–4.1)2.3 (1.6–3.5)0.367
Mucin (mg/ml)18.9 (12.3–21.0)10.7 (10.2–23.7)0.439
Total (G+F) actin (mg/ml)0.06 (0.03–0.09)0.07 (0.04–0.10)0.736