Table 5.

Distribution of controls and cases based on pleural effusion

Pleural effusion
	Pleural effusion	n	Mean	SD	Median	P
Cases + Controls	Present	192	9.48	4.17	9.00	< 0.001
	Absent	513	2.41	2.61	2.00
	Total	705	4.34	4.42	3.00
Controls	Present	31	9.68	4.47	8.00	< 0.001
	Absent	114	1.82	2.36	1.00
	Total	145	3.50	4.36	2.00
Only DM	Present	36	8.75	3.74	8.00	< 0.001
	Absent	79	2.30	2.71	2.00
	Total	115	4.32	4.28	3.00
DM + HTN	Present	71	9.51	4.13	9.00	< 0.001
	Absent	155	2.73	2.63	2.00
	Total	226	4.86	4.47	3.00
DM + HTN + CAD	Present	29	10.48	4.20	9.00	< 0.001
	Absent	48	2.88	2.69	2.50
	Total	77	5.74	4.97	4.00
DM + THY	Present	3	9.00	4.36	7.00	0.03
	Absent	8	2.75	3.15	2.00
	Total	11	4.45	4.39	3.00
Only HTN	Present	16	8.81	4.58	6.00	< 0.001
	Absent	87	2.20	2.27	2.00
	Total	103	3.22	3.64	2.00
HTN + CAD	Present	2	8.50	3.54	8.50	0.34
	Absent	8	5.25	4.10	4.00
	Total	10	5.90	4.04	5.50
HTN + THY	Present	2	12.00	4.24	12.00	0.04
	Absent	4	4.50	2.38	3.50
	Total	6	7.00	4.69	6.00
Only THY	Present	2	8.50	9.19	8.50	0.03
	Absent	10	1.40	2.50	0.00
	Total	12	2.58	4.52	1.00