Table 3.

Spearman's rank correlation coefficients (rho) between adenosine deaminase and cytokeratin 19 fragments in the pleural fluids of 119 patients with final diagnoses.

Diseases	Rho	95% confidence intervals	P value (two tailed)
Adenocarcinomas	0.5145	0.178–0.743	0.0036
Tuberculosis	−0.9614	−0.466 to 0.297	0.6265
Transudates	0.1805	−0.285 to 0.577	0.4336
Parapneumonics	−0.1321	−0.614 to 0.421	0.6387
Empyemas	−0.5663	−0.908 to 0.230	0.1511
Squamous cell carcinomas	0.07143	−0.720 to 0.782	0.9063
Lymphomas	0.4000	−0.911 to 0.983	0.7500
Other	−0.9429	−0.993 to 0.560	0.0167

Interpretation of rho: values above 0.70, strong correlation; 0.50–0.70, good correlation; 0.3–0.5, moderate correlation; and less than 0.30, poor correlation.