Table 3 Factors associated with method selection in simultaneous multiple regression models

Study period

Control

(Referent)

Intervention

6.00 [2.72, 13.24]^***

2.02 [0.98, 4.14]

3.15 [1.68, 5.90]^***

0.43 [0.29, 0.63]^***

0.47 [0.30, 0.75]^**

1.40 [0.62, 3.19]

Enrollment Site^a

 Clinic 1

(Referent)

 Clinic 2

1.32 [0.88, 1.99]

0.68 [0.42, 1.10]

0.74 [0.50, 1.11]

0.94 [0.66, 1.34]

1.71 [1.06, 2.76]^*

0.98 [0.49, 1.96]

 Clinic 3

0.92 [0.57, 1.49]

0.62 [0.35, 1.11]

1.02 [0.66, 1.58]

0.88 [0.59, 1.32]

1.29 [0.74, 2.25]

2.51 [1.29, 4.90]^**

Race & Ethnicity

 Latine (with any other race)

(Referent)

 Non-White, Other, non-Latine

0.56 [0.31, 1.01]

1.39 [0.69, 2.81]

1.15 [0.59, 2.23]

0.84 [0.49, 1.46]

1.70 [0.85, 3.40]

1.42 [0.62, 3.24]

 White, Non-Latine

0.50 [0.33, 0.76]^***

0.93 [0.53, 1.61]

1.86 [1.16, 2.98]^**

1.09 [0.74, 1.60]

1.51 [0.90, 2.56]

0.65 [0.33, 1.26]

Education level

 High school or less

(Referent)

 Any college

0.91 [0.61, 1.34]

0.98 [0.61, 1.56]

1.26 [0.86, 1.83]

1.26 [0.90, 1.75]

0.70 [0.46, 1.08]

0.85 [0.47, 1.54]

Employment status

Full- or part-time

(Referent)

 Student

0.98 [0.57, 1.68]

0.81 [0.42, 1.58]

1.27 [0.77, 2.09]

0.93 [0.58, 1.47]

0.91 [0.48, 1.76]

1.32 [0.60, 2.86]

 Out of Workforce^b

0.90 [0.40, 2.00]

1.46 [0.67, 3.19]

0.49 [0.20, 1.16]

0.78 [0.39, 1.58]

1.61 [0.77, 3.39]

1.21 [0.39, 3.74]

 Unemployed

1.17 [0.74, 1.85]

0.55 [0.29, 1.05]

0.85 [0.53, 1.37]

1.13 [0.76, 1.69]

1.26 [0.77, 2.08]

1.00 [0.48, 2.10]

Insurance type

 Private

(Referent)

 Medicaid or Medicare

1.34 [0.53, 3.40]

0.86 [0.26, 2.90]

0.59 [0.19, 1.87]

1.55 [0.59, 4.05]

1.09 [0.41, 2.92]

1.00 [1.00, 1.00]

 None

0.71 [0.47, 1.08]

0.75 [0.45, 1.24]

0.90 [0.61, 1.35]

2.19 [1.48, 3.25]^***

0.70 [0.44, 1.14]

0.93 [0.50, 1.75]

Federal poverty level (FPL)

 Up to 138%

(Referent)

 138% and greater

1.15 [0.76, 1.72]

0.58 [0.34, 0.99]^*

1.37 [0.94, 2.00]

1.11 [0.78, 1.57]

0.53 [0.32, 0.87]^*

1.53 [0.85, 2.75]

Parity

 Nulliparous

(Referent)

 Parous

1.18 [0.74, 1.88]

0.97 [0.55, 1.73]

1.49 [0.95, 2.34]

0.74 [0.49, 1.13]

0.99 [0.59, 1.65]

0.93 [0.46, 1.88]

Ever-use of LARC

 No

(Referent)

 Yes

1.02 [0.68, 1.53]

1.50 [0.93, 2.41]

1.70 [1.17, 2.48]^**

0.62^* [0.43, 0.89]

0.49 [0.30, 0.80]^**

0.92 [0.49, 1.71]

Age category

 18–19

(Referent)

 20–24

1.15 [0.67, 1.95]

1.06 [0.52, 2.16]

0.96 [0.55, 1.68]

1.17 [0.73, 1.87]

1.00 [0.54, 1.88]

1.05 [0.42, 2.62]

 25–29

0.97 [0.53, 1.77]

1.35 [0.62, 2.95]

0.75 [0.41, 1.40]

0.96 [0.57, 1.64]

1.49 [0.75, 2.99]

1.68 [0.64, 4.42]

 30–34

0.50 [0.21, 1.18]

1.60 [0.63, 4.03]

0.91 [0.43, 1.93]

0.88 [0.45, 1.74]

1.88 [0.83, 4.26]

1.62 [0.49, 5.31]

 35 + 

0.41 [0.16, 1.05]

0.96 [0.32, 2.85]

1.43 [0.64, 3.17]

1.21 [0.57, 2.60]

1.53 [0.60, 3.92]

1.61 [0.41, 6.38]

History of abortion

No

(Referent)

Yes

0.69 [0.39, 1.23]

1.22 [0.68, 2.18]

1.12 [0.69, 1.83]

0.80 [0.50, 1.27]

1.30 [0.77, 2.21]

1.36 [0.65, 2.84]