Research Article

The Association of Tree Pollen Concentration Peaks and Allergy Medication Sales in New York City: 2003–2008

Table 2

Estimated percent excess allergy medication sales at lags 0 through 6 days from pollen peak dates and PM2.5 (last row).

ModelsLag 0Lag 1Lag 2Lag 3Lag 4Lag 5Lag 6

Main model
(all boroughs)
13.0
(3.0, 24.0)
26.6
(15.3, 39.0)
28.7
(17.4, 41.2)
17.1
(6.8, 28.4)
10.5
(0.8, 21.1)
3.2
(−5.8, 13.0)
−1.9
(−10.5, 7.5)
By location of sales
 Manhattan13.5
(3.4, 24.6)
26.7
(15.3, 39.2)
27.7
(16.4, 40.1)
17.4
(6.9, 28.8)
11.4
(1.6, 22.1)
3.8
(−5.3, 13.8)
−1.2
(−9.9, 8.3)
 Bronx15.1
(0.9, 31.2)
29.7
(13.6, 48.0)
38.3
(21.3, 57.6)
19.9
(5.2, 36.7)
10.9
(−2.6, 26.3)
0.7
(−11.5, 14.6)
−2.3
(−14.1, 11.2)
 Brooklyn11.4
(0.3, 23.8)
27.9
(15.1, 42.1)
27.9
(15.3, 42.0)
15.5
(4.0, 28.3)
6.8
(−3.7, 18.4)
0.7
(−9.2, 11.7)
−5.3
(−14.6, 5.0)
 Queens14.6
(3.1, 27.3)
29.1
(16.1, 43.5)
29.8
(16.9, 44.1)
16.5
(4.8, 29.4)
7.7
(−2.9, 19.5)
2.1
(−8.0, 13.2)
−1.1
(−10.8, 9.7)
 Staten Island5.3
(−6.0, 18.1)
14.8
(2.4, 28.8)
16.4
(3.9, 30.3)
7.1
(−4.4, 20.0)
12.2
(0.2, 25.5)
−1.1
(−11.6, 10.6)
−1.3
(−11.7, 10.4)
 Outside NYC10.4
(−0.2, 22.2)
24.8
(12.7, 38.2)
31.7
(19.1, 45.7)
16.4
(5.2, 28.8)
9.4
(−1.0, 20.9)
3.2
(−6.6, 14.1)
−3.8
(−13.0, 6.3)

Sensitivity analysis
(all boroughs)
 With PM2.59.5
(−0.6, 20.7)
23.0
(11.8, 35.3)
24.6
(13.4, 37.0)
13.8
(3.4, 25.1)
7.4
(−2.4, 18.2)
0.9
(−8.2, 11.0)
−3.0
(−11.8, 6.6)
 Without year indicator12.5
(0.9, 25.5)
25.9
(12.8, 40.5)
28.1
(15.0, 42.8)
16.7
(4.6, 30.1)
10.1
(−1.1, 22.7)
2.6
(−7.9, 14.2)
−2.5
(−12.5, 8.5)
 Without temperature adjustment20.6
(9.4, 32.8)
35.8
(23.2, 49.6)
35.0
(22.6, 48.7)
20.5
(9.4, 32.8)
13.0
(2.6, 24.5)
4.6
(−5.1, 15.2)
−1.0
(−10.2, 9.0)
 Seasonal trend with d . f . = 6 12.4
(2.4, 23.3)
26.1
(14.8, 38.4)
28.6
(17.2, 41.0)
17.4
(7.0, 28.8)
11.0
(1.3, 21.7)
3.8
(−5.2, 13.8)
−1.1
(−9.8, 8.3)
 Seasonal trend with d . f . = 4 16.3
(5.9, 27.8)
30.3
(18.6, 43.2)
32.3
(20.5, 45.3)
20.3
(9.5, 32.2)
13.4
(3.3, 24.5)
5.8
(−3.6, 16.1)
0.4
(−8.5, 10.2)
 Seasonal trend with d . f . = 2 31.1
(17.4, 46.5)
49.0
(33.4, 66.6)
50.5
(34.8, 68.0)
37.5
(23.1, 53.6)
29.8
(16.4, 44.9)
23.6
(10.8, 37.8)
17.4
(5.3, 30.8)
 Without seasonal trend36.7
(21.5, 53.9)
54.8
(37.5, 74.2)
55.5
(38.3, 74.9)
41.8
(26.0, 59.6)
33.6
(18.8, 50.3)
27.7
(13.6, 43.6)
21.0
(7.7, 36.1)

PM2.5 Effects per 10 ug/m3−1.9
(−4.8, 1.2)
−3.2
(−6.4, 0.1)
−0.7
(−4.0, 2.7)
−1.2
(−4.4, 2.2)
−0.8
(−3.9, 2.5)
−1.2
(−4.2, 2.0)
0.2
(−2.5, 3.0)