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Table 3 Baseline correlations among participants and non-participants at one-year and 15- year follow-ups

From: Attrition and generalizability in longitudinal studies: findings from a 15-year population-based study and a Monte Carlo simulation study

Predictors of HSCL Drop-outs at one- year follow-up N = 155 Participants at one- year follow-up N = 758 Drop-outs at 15-year follow-up N = 514 Participants at 15- year follow-up N = 399
Women:
 Age -.12 -.17** -.14** -.18**
 Alone with child .19* .12** .16** .09
 Family finances -.33** -.28** -.29** -.28**
 Education -.15 -.18** -.20** -.13**
 Not working .16 .14** .14** .14**
 Emotionality .65** .55** .53** .62**
 Sociability -.16* -.19** -.22** -.13*
 Activity .00 -.01 -.01 -.01
 Partner support -.46** -.37** -.38** -.40**
 Emotional support from friends and family -.28** -.34** -.33** -.32**
 Chronic stressors .55** .54** .52** .56**
Children:
 Activity -.04 -.05 -.04 -.05
 Sociability -.04 .03 .05 -.02
 Emotionality .33** .22** .26** .20**
 Shyness .11 .07* .07 .09
  1. * p < .05, ** p < .01. None of the correlations between HSCL and other variables were significantly different among those who later stayed in the study and those who dropped out.