Table 1.

Characteristics of WMH samples and percent (and number) with history of chronic lung diseases.

Country	Field dates	Age range^a	Sample size		Response rate (%)	History of adult onset chronic lung diseases (21+)
			Part 1	Part 2 sub-sample		N	Weighted %	SE	Mean age of diagnosis	SE
Americas
Colombia	2003	18–65	4426	2381	87.7	3	0.2	0.1	33.7	2.2
Mexico	2001–2	18–65	5782	2362	76.6	7	0.1	0.0	39.6	6.4
United States	2002–3	18+	9282	5692	70.9	128	2.1	0.3	53.3	1.9
Peru	2005–6	18–65	3930	1801	90.2	4	0.4	0.2	36.8	7.1
Asia and South Pacific
Japan	2002–6	20+	4129	1682	55.1	16	0.9	0.3	55.1	4.2
PRC Shen Zhen^b	2006–7	18+	7132	2475	80.0	20	0.4	0.1	36.2	4.5
New Zealand	2003–4	18+	12,790	7312	73.3	107	1.4	0.2	54.3	2.3
Europe
Belgium	2001–2	18+	2419	1043	50.6	34	2.4	0.5	51.3	4.2
France	2001–2	18+	2894	1436	45.9	51	2.9	0.6	41.6	2.2
Germany	2002–3	18+	3555	1323	57.8	25	1.7	0.4	47.5	3.4
Italy	2001–2	18+	4712	1779	71.3	37	1.6	0.3	48.9	3.0
The Netherlands	2002–3	18+	2372	1094	56.4	20	1.1	0.5	50.8	3.7
Spain	2001–2	18+	5473	2121	78.6	55	1.5	0.3	47.4	2.0
Northern Ireland	2004–7	18+	4340	1986	68.4	11	0.3	0.1	47.0	3.1
Portugal	2008–9	18+	3849	2060	57.3	20	0.8	0.2	43.1	3.4
Romania	2005–6	18+	2357	2357	70.9	31	1.2	0.3	35.8	2.3
Poland	2010–11	18–64	10,081	4000	50.4	26	0.6	0.1	43.5	1.7
Middle East
Israel	2002–4	21+	4859	4859	72.6	177	3.4	0.3	43.4	1.1
Iraq	2006–7	18+	4332	4332	95.2	18	0.5	0.1	51.9	5.4
Mean age of diagnosis (all countries combined)									47.6	0.8
Prevalence of chronic lung disease (all countries combined)							1.3	0.1
Weighted average response rate (%)					67.4
Total sample size			98,714	52,095		790

For the purposes of cross-national comparisons we limit the sample to 18 + .

People's Republic of China.