TABLE 1—

Change in Philadelphia Syringe Exchange Program Use Measures Before and After Police Intervention

	Total Visits	Black Visits	White Visits	Male Visits	Female Visits
Comparison period
3 wks before vs 3 wks after
Total change	−340	−196	−117	−286	−35
Mean change	−113	−65	−39	−95	−12
% Change	−23.60	−33.40	−16.41	−26.21	−11.59
3 mos before vs 3 mos after
Total change	−896	−639	−305	−1071	−148
Mean change	−69	−49	−23	−82	−11
% Change	−14.30	−25.24	−9.67	−21.83	−10.86
6 mos before vs 6 mos after
Total change	−1759	−1285	−557	−2292	−341
Mean change	−68	−49	−21	−88	−13
% Change	−13.73	−24.56	−8.74	−22.27	−11.61
9 mos before vs 9 mos after
Total change	−3539	−2428	−1276	−3119	−559
Mean change	−91	−62	−33	−80	−14
% Change	−18.10	−30.10	−13.02	−21.09	−13.03
Previous year period
3 wks before vs 3 wks after
Total change	40	16	12	48	−6
Mean change	13	5	4	6	−2
% Change	2.87	2.75	1.70	4.70	1.06
3 mos before vs 3 mos after
Total change	110	141	−33	99	23
Mean change	8	11	−3	7	2
% Change	1.92	6.20	−3.64	2.30	1.70
6 mos before vs 6 mos after
Total change	474	−9	307	338	109
Mean change	18	0	12	10	4
% Change	4.00	−0.17	5.26	3.63	4.03
9 mos before vs 9 mos after
Total change	1347	−346	586	677	164
Mean change	34	−9	16	17	4
% Change	7.39	−4.07	6.78	3.76	3.86