* Geographic regions were defined according to categories used by the U.S. Census.
Seasons were defined as: spring, Mar. 20th-Jun. 19th; summer, Jun. 20th-Sept. 21st; fall, Sept. 22nd-Dec. 20th; winter, Dec. 21st-Mar. 19th.
Table 2. Association between prenatal acid suppressant medication exposure and allergic sensitization in early childhood