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. Author manuscript; available in PMC: 2014 Jun 30.
Published in final edited form as: Stat Med. 2012 Dec 12;32(14):2390–2405. doi: 10.1002/sim.5691

Table 4.

Comparison of mean USO and percent of zero USO between the two treatment groups at baseline, 3- and 6-month follow-up for the CTN0018 Study.

Mean USO and number of zeros at each assessment time for CTN0018 study
Intervention (S.D.) Without intervention (S.D.) zeros (%)
Baseline 21.46(26.66) 22.34(27.77) 65(15.40)
USO at 3 months 15.71(25.43) 18.14(27.21) 125(32.80)
USO at 6 months 15.05(23.35) 17.19(25.89) 132(38.26)