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Table 2 Comparison of dimensions of quality of life by data collection time period

From: Prediction of maternal quality of life on preterm birth and low birthweight: a longitudinal study

  Range M±SD B Wald X 2 p 95% CI
Physical health       
 T1 (referent) 0–100 59.55±17.72 - - - -
 T2 0-100 55.84±18.49 −3.66 11.53 .001 −5.77, -1.55
 T3 0-90 50.77±18.58 −8.82 48.01 <.001 −11.32, -6.33
 T4 10-100 70.00±19.92 10.46 41.33 <.001 7.27, 13.65
Mental health       
 T1 (referent) 10–100 68.99±18.11 - - - -
 T2 20–100 70.41±18.48 1.52 1.63 .20 -.81, 3.85
 T3 20–100 69.28±20.89 .30 .06 .81 −2.04, 2.63
 T4 20–100 69.60±20.94 .61 .15 .70 −2.47, 3.69
 Unhappy (referent) 50-80 56.92±10.32 - - - -
 Happy 20-100 70.25±17.55 3.61 1.05 .31 −3.29, 10.51
 Uncertain 10-100 67.20±22.46 -.60 .02 .90 −9.64, 8.44
 Lower than college (referent) 10-100 64.76±19.25 - - - -
 Equal to or higher than college 20-100 70.96±17.27 .10 .001 .97 −4.90, 5.09
 Unemployed 20-100 62.36±16.23 - - - -
 Employed 10-100 72.78±18.09 8.26 11.33 .001 2.46, 3.45
Social health       
 T1 (referent) 20–100 65.20±17.06 - - - -
 T2 10–100 64.87±18.70 -.27 .07 .80 −2.35, 1.80
  1. Demographic variables that showed differences on the quality of life variables were controlled for in these analyses. T1 = 25–29 gestational weeks; T2 = 30–34 gestational weeks; T3= over 34 gestational weeks; T4 = 4–6 weeks postpartum.