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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: JAMA Psychiatry. 2015 Oct;72(10):1037–1044. doi: 10.1001/jamapsychiatry.2015.1472

Table 2.

Menstrual Cycle Symptom Scores for Primary and Secondary Outcome Measures, by Random Assignment

Number of Participants PMTS IDS-C CGI-S CGI-I
Visit Act. Pla. Active Placebo Active Placebo Active Placebo Active Placebo
Baseline 125 127 22.3 (4.8) 21.4 (4.5) 35.4 (10.7) 32.8 (10.4) 4.5 (0.7) 4.5 (0.6)
Cycle 1 110 123 15.6 (7.3) 16.8 (6.0) 23.7 (12.3) 24.0 (11.4) 3.4 (1.0) 3.8 (0.9) 2.7 (1.1) 3.2 (1.0)
Cycle 2 104 112 14.1 (6.9) 15.6 (6.1) 21.0 (11.7) 22.8 (10.6) 3.1 (1.2) 3.3 (1.1) 2.4 (1.0) 2.7 (1.1)
Cycle 3 100 101 13.0 (8.0) 14.0 (5.8) 19.2 (13.1) 19.6 (10.0) 2.8 (1.3) 3.0 (1.0) 2.3 (1.3) 2.4 (1.0)
Cycle 4 95 98 12.9 (6.7) 13.9 (6.3) 17.3 (11.1) 19.1 (9.9) 2.6 (1.2) 2.9 (1.2) 2.1 (1.2) 2.5 (1.3)
Cycle 5 88 85 11.4 (6.3) 12.4 (6.3) 15.2 (9.9) 16.7 (10.4) 2.4 (1.0) 2.7 (1.1) 2.0 (1.0) 2.1 (1.2)
Cycle 6 88 88 11.7 (6.8) 12.8 (6.9) 15.5 (10.7) 17.8 (11.0) 2.2 (1.1) 2.5 (1.3) 1.8 (0.9) 2.2 (1.3)
Average Change from Baseline 88 88 −10.6 (6.6) −8.9 (7.4) −20.0 (11.4) −15.3 (12.5) −2.3 (1.2) −1.9 (1.4) −0.9 (1.2)** −0.8 (1.4)**
Group F(1,249)=1.6,
p=0.21
F(1,245)=0.4,
p=0.54
χ2(1)=6.2,
p=0.01
χ2(1)=6.7,
p=0.01
Time F(6,447)=131.8,
p<.001
F(6,1210)=60.7,
p<.001
χ2(6)=182.8,
p<.001
χ2(5)=29.9,
p<.001
Group by Time F(6,448)=2.1,
p=0.06
F(6,1183)=2.6,
p=0.02
χ2(6)=7.5,
p=0.28
Estimated Mean difference from baseline to end point between active vs. placebo (95% CI) 1.88 (0.01 – 3.75) 5.14 (1.97 – 8.31) 0.59 (0.30 – 1.19) 0.55 (0.30 – 1.02)*
*

Represents difference between groups at end-point only

**

Represents average change from Cycle 1 to end-point