Table 1

Distribution of incident angina by employment grade and effort-reward imbalance tertiles at phases 1 and 5 of the Whitehall II study

	Employment grade, phase 1
		Men			Women
Incident angina	High	Medium	Low	High	Medium	Low
No (%)	97.4	96.6	96.2	97.1	96.9	95.5
Yes (%)	2.6	3.4	3.8	2.9	3.1	4.5
n	1851	2354	287	278	804	761

	Effort-reward imbalance tertiles, phase 1
		Men			Women
Incident angina	High	Medium	Low	High	Medium	Low
No (%)	96.6	96.9	97.3	95.2	96.8	96.8
Yes (%)	3.4	3.1	2.7	4.8	3.2	3.2
n	1703	1573	1213	440	556	842

	Effort-reward imbalance tertiles, phase 5
		Men			Women
Incident angina	High	Medium	Low	High	Medium	Low
No (%)	96.4	97.9	97.9	96.5	97.7	95.4
Yes (%)	3.6	2.1	2.1	3.5	2.3	4.6
n	749	772	796	255	217	219

	Change in effort-reward imbalance tertiles, phases 1 to 5
		Men			Women
Incident angina	Increase	Same	Decrease	Increase	Same	Decrease
No (%)	97.1	96.8	98.1	96.5	97.0	95.7
Yes (%)	2.9	3.2	1.9	3.5	3.0	4.3
n	695	808	874	162	233	314

	Employment grade, phase 1
		Men			Women
Increased ERI	High	Medium	Low	High	Medium	Low
No (%)	77.3	66.9	53.8	61.6	60.9	45.7
Yes (%)	22.7	33.1	46.3	38.4	39.1	54.3
n	1125	1573	160	164	445	328