Table 3.

Incidence of relapses/100 PY at risk

	Cases	Mean PY	PYAR at risk	No. of relapses	Relapse/100 PYAR
Age (years)
<15	81	4.62	374.4	06	1.6
15–34	221	4.23	933.8	11	1.2
35–54	220	4.53	996.7	10	1.0
>54	77	4.31	331.7	08	2.4
Total	599	4.39	2636.4	35	1.3
Sex
Male	287	4.27	1226.9	16	1.3
Female	312	4.52	1409.5	19	1.4
Delay in treatment (years)
Up to 1	301	4.37	1315.2	17	1.3
1–2	201	4.22	850.8	11	1.3
>3	97	4.85	470.4	07	1.5
Patches
0–2	466	4.37	2037.7	28	1.4
3–5	133	4.50	598.7	07	1.2
Nerves
0	344	4.24	1458.7	21	1.4
1	255	4.62	1177.7	14	1.2

PY, person-years; PYAR, person-years at risk.