Table 4. Subgroup analysis in PSM groups.

	Rate (per 10000 person months)
Subgroup	In control	In MP exposure	aHR (95% CI)
Sex
Male	29.2(25.6–33.4)	33.0(27.5–39.7)	1.1(0.9–1.4)
Female	36.0(31.9–40.8)	41.4(35.1–48.8)	1.1(0.9–1.4)
p for interaction			0.9344
Age at baseline
<20	34.4(30.9–38.2)	35.4(30.5–41.2)	1.0(0.9–1.3)
20–59	28.1(22.9–34.4)	44.3(35.0–56.1)	1.6(1.1–2.2)
> = 60	29.4(20.7–41.8)	31.6(18.7–53.4)	0.8 (0.4–1.7)
p for interaction			0.0775
Low-income
No	32.4(29.6–35.5)	36.8(32.5–41.6)	1.1(1.0–1.3)
Yes	48.5(20.2–116.4)	156.9(58.9–417.9)	3.3(0.4–28.7)
p for interaction			0.1343
Allergic rhinitis
No	28.7(25.6–32.2)	33.8(29.0–39.4)	1.18(1.0–1.4)
Yes	41.9(36.1–48.6)	45.7(37.2–56.3)	1.1(0.8–1.4)
p for interaction			0.5359
Antihistamines
No	28.6(25.5–32.1)	33.7(28.9–39.4)	1.2(1.0–1.4)
Yes	41.9(36.2–48.6)	45.1(36.8–55.1)	1.1(0.8–1.4)
p for interaction			0.5094