Table 3. Window-based incident infection rates (IIR) among the 748 HIV notifications July 05–June 06.

ALG #	Window days	N ruled incident 1)	N estimated incident	Raw IIR-W	Diagnostic specificity %1)	Adjusted IIR-W
BED-EIA 2)	153	262	625	0.836	80.1	0.669
2	103.8	105	369	0.494	95.4	0.471
3	45.8	39	311	0.416	100.0	0.416
3.1	48.2	44	333	0.445	100.0	0.445
3.2	95.4	84	322	0.430	98.1	0.422
4	121.0	130	392	0.524	92.7	0.486
4.1	130.1	151	424	0.566	91.9	0.521
5	49.7	45	330	0.442	95.5	0.422
6	74.2	93	457	0.611	90.8	0.555
7	105.3	92	319	0.426	98.4	0.419
8	110.3	95	314	0.420	96.8	0.407
8.1	110.3	94	311	0.416	96.8	0.402
9	103.6	88	310	0.414	98.4	0.408
11	127.4	128	367	0.490	93.4	0.458
11.1	127.4	128	367	0.490	93.4	0.458
11.2	127.4	127	364	0.486	94.1	0.457
12	129.3	130	367	0.491	93.4	0.458
12.1	129.3	130	367	0.491	93.4	0.458
13	121.0	123	371	0.496	95.0	0.471
13.1	123.2	140	415	0.554	93.9	0.521
14	77.5	73	344	0.460	97.8	0.450
15	121.9	140	419	0.560	94.3	0.529
15.1	120.3	137	416	0.556	95.1	0.529
16	109.6	109	363	0.485	96.6	0.469
17	99.3	89	327	0.438	98.2	0.430
18	98.1	74	275	0.368	98.2	0.362
mean	104.4	103.5	358.1	0.479	95.7	0.457
SD	26.2	31.9	44.3	0.059	2.5	0.047
CV%	25.1	30.8	12.4	12.4	2.7	10.3
lower limit 95% CI	94.1	91.0	340.8	0.456	94.7	0.438
upper limit 95% CI	114.6	116.0	375.5	0.502	96.7	0.475

¹⁾Representing the specificity in infections >12 months; taken with permission from [19].

²⁾BED data taken with permission from [17].

SD, standard deviation; CV%, coefficient of variation shown as percentage; CI, confidence interval.