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. Author manuscript; available in PMC: 2021 Nov 8.
Published in final edited form as: Pediatrics. 2017 Nov 6;140(6):e20171117. doi: 10.1542/peds.2017-1117

TABLE 2.

Days Undervaccinated, Mean Ranks for Days Undervaccinated and Difference in the Mean Ranks Between Study Arms (n = 888)

Study Arm Days Undervaccinated Percentiles Mean Ranksa Study Arm Comparisons Difference in Mean Ranks P b
5th 50th 95th
VSM (n = 442) 0 0 155 438.46 VSM versus UC −26.91 .02
VI (n = 297) 0 0 107 443.03 VI versus UC −22.34 .08
UC (n = 149) 0 0 411 465.37 VSM versus VI   −4.57 .63
a

Obtained by ranking all observations in increasing order of magnitude of days undervaccinated and calculating the mean.

b

Obtained by using 1-way analysis of variance on the ranks for days undervaccinated.