Table 3 Beryllium lymphocyte proliferation test results of 2000–4 workers included in calculation of sensitisation incidence*.

	Time of hire	Interval (months)
		3	6	12	24	48
Normal	90	88	80	52	30	11
Abnormal†	0	0	1	0	3	0
Uninterpretable‡	3	1	0	1	0	0
Missed§	0	4	0	0	0	0
Total workers	93	93	81	53	33	11

*Incidence calculation excludes the four workers with abnormal results at time of hire; results for these four workers are shown in table 4.

†Initial (not confirmatory) results shown; any results after confirmation of sensitisation are not shown.

‡In most cases, uninterpretable tests were repeated, and those repeat results are shown; in the five cases indicated, repeat tests were not performed.

§The worker was not tested in this interval, but was tested in the following interval.