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. Author manuscript; available in PMC: 2019 Sep 1.
Published in final edited form as: Obstet Gynecol. 2018 Sep;132(3):612–618. doi: 10.1097/AOG.0000000000002787

Table 1.

Baseline characteristics of participants by treatment group

Demographics Pregabalin
(n=55)
Placebo
(n=52)
Age
 Mean (years) 27.25±5.45 27.19±6.02
Race *
 White 20 (36.4%) 21 (40.4%)
 Black 4 (7.3%) 3 (5.8%)
 Asian 34 (61.8%) 27 (51.9%)
 Native Hawaiian 17 (30.9%) 17 (32.7%)
 Hispanic 10 (18.2%) 7 (13.5%)
 Other 4 (7.3%) 3 (5.8%)
 Multiracial 23 (41.8%) 21 (40.4%)
Education
 Some high school 0 (0%) 3 (5.8%)
 Graduated high school 8 (14.5%) 13 (25%)
 Some college 29 (52.7%) 24 (46.2%)
 Graduated college 15 (27.3%) 12 (23.1%)
 Post-college degree 3 (5.5%) 0 (0%)
Mental Health
 Depression 11 (20%) 10 (19.2%)
 Anxiety 7 (12.7%) 9 (17.3%)
Pregnancy history
 First pregnancy 16 (29.1%) 16 (30.8%)
 Prior surgical abortion 22 (40%) 18 (34.6%)
 Prior medical abortion 6 (10.9%) 7 (13.5%)
 Prior miscarriage 13 (23.6%) 11 (22.2%)
 Parous 33 (60%) 29 (55.8%)
 Prior vaginal delivery 29 (52.7%) 25 (48.1%)
 Prior cesarean section 5 (9.1%) 7 (13.5%)
Gestational age
 Mean (days) 53.51±8.16 55.15±6.90
 Groups (days)
  41-49 19 (34.5%) 14 (26.9%)
  50-56 14 (25.5%) 19 (36.5%)
  57-63 15 (27.3%) 12 (23.1%)
  64-70 7 (12.7%) 7 (13.5%)

Data are n (%) or mean ± standard deviation.

*

Participants could select more than one race.