Table 2.

Altitude and prevalence of COPD (post-BD FEV1/FVC<LLN) by site and ascending order of altitude

	Site	Study	Altitude (m)	COPD prevalence (%)
1	Bergen, Norway	BOLD	5	12.5
2	Mumbai, India	BOLD	5	6.8
3	Barcelona, Spain	EPI-SCAN	10	10.7
4	Vigo, Spain	EPI-SCAN	10	4.8
5	Manila, Philippines	BOLD	11	8.5
6	CapeTown, South Africa	BOLD	14	19.0
7	Guangzhou, China	BOLD	18	7.8
8	Baranquilla, Colombia	Prepocol	18	3.6
9	Sydney, Australia	BOLD	19	10.9
10	Nampicuan, Philippines	BOLD	20	14.3
11	Uppsala, Sweden	BOLD	21	9.3
12	London, England	BOLD	22	16.0
13	Sevilla, Spain	EPI-SCAN	23	4.9
14	Adana, Turkey	BOLD	28	14.3
15	Vancouver, Canada	BOLD	32	12.3
16	Montevideo, Uruguay	Platino	35	11.9
17	Sousse, Tunisia	BOLD	38	5.0
18	Tartu, Estonia	BOLD	39	7.0
19	Maastricht, Netherlands	BOLD	53	18.2
20	Reykjavik, Iceland	BOLD	54	11.0
21	Lisbon, Portugal	BOLD	56	11.5
22	Hannover, Germany	BOLD	59	8.9
23	Cordoba, Spain	EPI-SCAN	133	9.4
24	Krakow, Poland	BOLD	214	13.7
25	Oviedo, Spain	EPI-SCAN	239	11.0
26	Ife, Nigeria	BOLD	266	6.9
27	Lexington, USA	BOLD	291	15.2
28	Salzburg, Austria	BOLD	424	15.8
29	Huesca, Spain	EPI-SCAN	457	7.2
30	Vic, Spain	EPI-SCAN	497	5.7
31	Santiago, Chile	Platino	543	9.7
32	Pune, India	BOLD	560	6.1
33	Requena (Valencia), Spain	EPI-SCAN	588	6.2
34	Madrid La Princesa, Spain	EPI-SCAN	648	10.9
35	Madrid La Paz, Spain	EPI-SCAN	648	6.6
36	Sao Paulo, Brazil	Platino	800	11.1
37	Burgos, Spain	EPI-SCAN	864	3.9
38	Caracas, Venezuela	Platino	950	8.5
39	Bucaramanga, Colombia	Prepocol	960	5.3
40	Cali, Colombia	Prepocol	995	5.6
41	Medellin, Colombia	Prepocol	1538	10.6
42	Srinagar, India	BOLD	1587	16.4
43	Mexico City, Mexico	Platino	2240	3.8
44	Bogotá, Colombia	Prepocol	2640	5.2