High Salt Intake and Risk of Chronic Bronchitis: The Copenhagen Male Study—A 10-Year Followup

Table 2

Association of baseline characteristics 1976 with chronic bronchitis ten years later among men with no relevant lung symptoms at baseline, 𝑛=2,183.

	Chronic bronchitis in 1985-86
	+	−
Subjects 𝑛	155	2028
Age yrs	53.1 ± 5.1	52.7 ± 5.1^+
High salt intake	33.8	22.9^##
Smoking
Current smoking	76.8	54.6^##
Smoking 1970/71	79.4	61.2^##
Alcohol use
Alcohol, beverages/week
0–5	58.1	60.9
6–20	36.8	34.5
21 +	5.2	4.6
Occupational dust and fumes exposure	34.4	20.3^##
Other characteristics
Low social class (IV/V)	56.1	47.8^++

Data are presented as mean ± SD or percentages. ^#: high salt preference; ⁺⁺: 𝑃<0.05; ⁺: 𝑃<0.10; ^##: 𝑃<0.01 𝑃 value of Chi-squared test or unpaired 𝑡-test (age).