Table 2.

Breast Milk Expression Data (Results Are Median [25th and 75th Centiles])

MPEPP
As randomizedn = 60n = 58
 Total number of expressions38 (15, 69)34 (15, 74).8
 Mean expressions/day3.7 (3.0, 4.1)3.9 (3.2, 4.4).3
 Total time spent expressing (min)745 (289, 1321)515 (231, 1069).06
 Mean time/day spent expressing65 (56, 85)51 (38, 63)<.001
 Total volume expressed (mL)1928 (322, 5408)2062 (728, 5485).6
 Mean volume/day expressed199 (57, 323)218 (126, 341).5
As randomized with data for mothers who changed pumps included until they changed
 Total number of expressions37 (15, 69)31 (14, 62).8
 Mean expressions/day3.7 (3.0, 4.1)3.9 (3.2, 4.3).4
 Total time spent expressing (min)745 (283, 1321)406 (216, 857).02
 Mean time/day spent expressing66 (56, 85)50 (38, 63)<.001
 Total volume expressed (mL)1806 (314, 5408)1653 (554, 5152).8
 Mean volume/day expressed199 (57, 323)205 (119, 341).6
  • The number of participants per group for the analysis (MP, n = 60; EP, n = 58) is less than the number randomized as some mothers (14 MP and 13 EP) failed to fill in the daily milk collection sheets.