Table 3.

Odds ratios for major cardiovascular diseases by workplace size

Disease / Workplace size	Crude OR (95% CI)	Adjusted OR (95% CI)
Hypertensive diseases (I10–I15)
1	1.12 (1.10–1.15)	0.85 (0.83–0.87)*
2–4	0.96 (0.95–0.97)	0.94 (0.93–0.95)*
5–29 (Ref)	1.00	1.00
30–49	1.09 (1.09–1.10)	1.07 (1.06–1.08)*
50–99	1.07 (1.06–1.08)	1.09 (1.08–1.10)*
100–299	0.95 (0.95–0.96)	1.06 (1.05–1.07)*
300–999	0.83 (0.83–0.84)	1.03 (1.03–1.04)*
≥ 1,000	0.70 (0.70–0.70)	0.94 (0.93–0.95)*
IHD (I20–I25)
1	1.58 (1.48–1.68)	1.12 (1.05–1.19)*
2–4	1.03 (1.01–1.06)	1.05 (1.03–1.08)*
5–29 (Ref)	1.00	1.00
30–49	0.99 (0.96–1.02)	0.98 (0.95–1.01)
50–99	0.96 (0.94–0.99)	0.99 (0.96–1.01)
100–299	0.89 (0.87–0.91)	0.98 (0.95–1.00)
300–999	0.80 (0.78–0.83)	0.96 (0.94–0.99)*
≥ 1,000	0.72 (0.71–0.74)	1.00 (0.98–1.02)
Other forms of heart disease (I30–I52)
1	1.27 (1.16–1.39)	1.03 (0.94–1.13)
2–4	1.03 (0.99–1.06)	1.02 (0.99–1.06)
5–29 (Ref)	1.00	1.00
30–49	1.00 (0.97–1.04)	0.97 (0.94–1.01)
50–99	0.98 (0.94–1.01)	0.97 (0.94–1.01)
100–299	0.91 (0.88–0.94)	0.97 (0.94–1.00)
300–999	0.92 (0.89–0.95)	1.06 (1.02–1.09)*
≥ 1,000	0.85 (0.83–0.87)	1.08 (1.05–1.11)*
Cerebrovascular diseases (I60–I69)
1	1.34 (1.24–1.44)	1.04 (0.97–1.12)
2–4	1.04 (1.01–1.07)	1.03 (1.00–1.06)
5–29 (Ref)	1.00	1.00
30–49	1.03 (1.00–1.06)	0.99 (0.96–1.02)
50–99	0.94 (0.91–0.97)	0.94 (0.91–0.97)*
100–299	0.87 (0.85–0.89)	0.97 (0.94–0.99)*
300–999	0.80 (0.78–0.82)	0.99 (0.96–1.02)
≥ 1,000	0.75 (0.73–0.77)	1.06 (1.03–1.08)*

Crude OR: unadjusted odds ratio. Adjusted OR: adjusted for sex and age (5-year groups). Reference category: workplace size 5–29 workers

*Statistically significant (95% CI excludes 1.00)

Abbreviations: OR odds ratio, CI confidence interval