Table 3

Factors associated with PID admissions, by PID category, 2009–2014

CT-related or NG-related PIDAcute PIDUnspecified PIDChronic PID
aIRR(95% CI)aIRR(95% CI)aIRR(95% CI)aIRR(95% CI)
Age group in years
 15–2411.68(8.60 to 15.85)0.74(0.62 to 0.89)1.46(1.38 to 1.55)0.20(0.18 to 0.23)
 25–342.95(2.11 to 4.13)0.93(0.78 to 1.10)1.18(1.12 to 1.25)0.69(0.64 to 0.75)
 35–441.01.01.01.0
Area of residence
 Metropolitan1.01.01.01.0
 Inner regional0.88(0.71 to 1.08)1.31(1.09 to 1.58)1.13(1.06 to 1.20)1.10(1.00 to 1.22)
 Outer regional/remote1.56(1.24 to 1.96)1.78(1.43 to 2.22)1.68(1.54 to 1.83)1.11(0.97 to 1.27)
Socioeconomic status of area
 Deciles of increasing disadvantage1.08(1.05 to 1.11)1.06(1.03 to 1.09)1.06(1.05 to 1.07)1.01(1.00 to 1.03)
Year
 20091.01.01.01.0
 20101.56(1.18 to 2.07)1.08(0.84 to 1.40)1.09(1.00 to 1.18)0.96(0.85 to 1.09)
 20111.52(1.15 to 2.01)1.36(1.06 to 1.75)1.19(1.09 to 1.29)0.94(0.83 to 1.06)
 20121.72(1.31 to 2.52)1.18(0.92 to 1.52)1.12(1.03 to 1.22)0.92(0.81 to 1.04)
 20131.89(1.44 to 2.47)1.17(0.91 to 1.52)1.12(1.03 to 1.22)1.00(0.88 to 1.13)
 20141.73(1.31 to 2.28)1.15(0.89 to 1.50)1.09(1.00 to 1.19)0.83(0.73 to 0.95)
  • aIRR, adjusted incidence rate ratio; CT-related or NG-related PID, chlamydial (Chlamydia trachomatis) or gonococcal (Neisseria gonorrhoeae) PID; PID, pelvic inflammatory disease.