Table 4 Beryllium lymphocyte proliferation test (BeLPT) results of 2000–4 workers who had at least one abnormal BeLPT result during surveillance*.

Worker	Time of hire	3 months	6 months	12 months	24 months	48 months
A	Normal	Normal	Normal	Normal	Abnormal (4/4)†	Abnormal
B	Normal	Normal	Normal	Normal	Abnormal (1/5)	Normal
C	Normal	Normal	Abnormal (1/5)
D	Normal	Normal	Normal	Normal	Abnormal (1/4)
E	Abnormal (3/3)	Abnormal	Normal
F	Abnormal (1/3)	Normal	Abnormal (1/1)	Normal
G	Abnormal (1/3)	Abnormal (1/1)	Normal
H	Abnormal (1/3)	Normal	Normal	Normal	Normal

*If initial results were uninterpretable, interpretable repeat results are shown.

†Numbers in parentheses indicate the number of abnormal results/total number of interpretable results (including confirmatory results) associated with the interval; bold lettering indicates that sensitisation was confirmed in the interval.