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. 2016 Aug 19;19(4):417–425. doi: 10.1093/ntr/ntw200

Table 1.

Study and Sample Characteristics

	Study	N _CPD	Age^a	Sex (% male)	CPD^a	N _FTND	Age^a	Sex (% male)	FTND^a
EA	COPDGene	6670	62.09±8.84	52.37	25.84±11.44	2568	57.50±7.86	53.35	4.83±2.42
	SAGE	1255	35.74±6.92	37.83	25.90±19.94	1673	37.53±8.65	43.93	2.99±3.29
	CADD-GADD	588	23.44±4.40	73.98	17.96±11.54	NA	NA	NA	NA
	MESA	628	63.03±9.95	56.53	20.59±21.66	NA	NA	NA	NA
AA	COPDGene	3300	54.68±7.21	55.94	21.30±10.41	2567	53.34±6.04	57.78	4.93±2.34
	SAGE	594	39.30±6.81	47.47	23.64±17.39	779	40.03±7.13	49.81	3.92±2.87
	MESA	53	63.64±9.91	49.06	12.77±11.10	NA	NA	NA	NA

NA = not applicable.

^aMean ± standard deviation.