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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Contraception. 2016 Jan 14;93(5):432–437. doi: 10.1016/j.contraception.2016.01.004

Table 2.

Characteristics associated with family physicians inserting IUDs and/or inserting and removing implantable contraception, adjusted modela

Adjusted OR for IUDs
(95% confidence interval)
Adjusted OR for implants
(95% confidence interval)
Gender
  Male REF --
  Female 1.71 (1.25-2.33) --
Race
  Non-White -- REF
  White -- 0.64 (0.42-0.98)
Member of Residency Faculty
  No REF REF
  Yes 1.67 (0.42-0.98) 1.42 (0.96-2.11)
Years in Practice
  21 or more REF --
  11 – 20 1.49 (1.05-2.13) --
  10 or fewer 1.60 (1.07-2.40) --
Ownership
  Group, private practice -- REF
  Solo, private practice -- 2.43 (1.33-3.79)
  Hospital/Integrated health network -- 1.67 (1.10-2.53)
  Public -- 1.95 (1.18-3.23)
  Miscellaneous -- 0.93 (0.38-2.27)
Size
  Solo REF --
  2-5 providers 1.37 (0.84-2.25) --
  6 or more providers 1.78 (1.10-3.86) --
Mix
  Single specialty -- REF
  Multi-specialty -- 1.45 (1.01-2.09)
Prenatal Care
  No prenatal care, no deliveries REF REF
  Provides prenatal care, no deliveries 3.38 (1.88-6.06) 1.36 (0.76-2.44)
  Provides prenatal care and deliveries 3.26 (1.93-5.49) 1.77 (1.15-2.74)
Performs Skin Procedures
  No REF REF
  Yes 1.64 (0.97-2.77) 3.07 (1.47-6.42)
Performs Endometrial Biopsies
  No REF REF
  Yes 16.51 (11.97-22.79) 3.67 (2.41-5.59)
Performs Implant Insertions and Removals
  No REF --
  Yes 8.78 (5.79-13.33) --
Performs IUD insertions
  No -- REF
  Yes -- 8.58 (5.70-12.91)
a

Models were built by starting with all variables listed in Table 2. Variables were removed in a backwards selection process (separately for IUD and implant) until removing any further variables did not improve model fit. Variables with results shown are those that remained in the final model for either IUD or implant.