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Table 2 General characteristics of age difference between wife and husband at baseline (2006)

From: The impact of age differences in couples on depressive symptoms: evidence from the Korean longitudinal study of aging (2006–2012)

  Total Wife  
  N % %* Mean Mean* SD* P-value
Wife-Husband       <.0001***
≥ +3 62 2.15 2.17 1.32 1.70 1.03  
+1 ~ +2 145 5.03 5.10 0.46 0.50 0.94  
0 251 8.71 8.88 0.34 0.32 0.92  
−2 ~ −1 623 21.62 21.05 0.32 0.31 0.76  
−4 ~ −3 748 25.96 26.16 0.30 0.27 0.82  
−6 ~ −5 533 18.50 18.52 0.38 0.35 0.75  
≤ −7 519 18.01 18.12 0.47 0.47 2.33  
Age        <.0001***
≤55 1,277 44.32 48.23 0.22 0.23 0.64  
56-65 930 32.28 34.56 0.34 0.36 0.71  
66-75 575 19.96 14.65 0.69 0.74 1.30  
≥75 99 3.44 2.55 1.14 1.28 2.15  
Education        0.438
≤ Middle school 2,026 70.32 68.00 0.47 0.46 1.06  
High school 694 24.09 25.90 0.19 0.19 0.56  
≥ College 161 5.59 6.10 0.15 0.19 0.44  
Income        0.432
Yes 407 14.13 15.17 0.28 0.31 0.70  
No 2,474 85.87 84.83 0.40 0.39 0.98  
Number of familiarity        0.156
Every day 1,027 35.65 34.77 0.34 0.32 0.86  
Sometimes 1,624 56.37 56.73 0.39 0.39 0.98  
Never 230 7.98 8.50 0.56 0.50 1.04  
Smoking status        0.029*
Never 2,817 97.78 97.84 0.37 0.36 0.91  
Former smoker 12 0.42 0.41 1.42 1.13 2.19  
Smoker 52 1.80 1.75 0.90 0.99 1.81  
Alcohol use        <.0001***
No 2,259 78.41 76.76 0.37 0.36 0.92  
Former user 66 2.29 2.31 1.14 1.15 1.94  
Yes 556 19.30 20.93 0.34 0.34 0.82  
Economic activity        0.803
Yes 905 31.41 33.31 0.30 0.30 0.79  
No 1,976 68.59 66.69 0.42 0.41 1.01  
Self-rated health        <.0001***
Good 1,169 40.58 42.66 0.14 0.15 0.54  
Normal 934 32.42 32.40 0.37 0.39 0.97  
Bad 778 27.00 24.94 0.77 0.75 1.22  
Depression of partner        <.0001***
Yes 576 19.99 19.24 0.95 1.01 1.33  
No 2,305 80.01 80.76 0.24 0.23 0.76  
Marital satisfaction        0.000**
Low 167 5.80 5.59 0.68 0.69 1.13  
Middle 1,513 52.52 53.30 0.46 0.46 1.08  
High 1,201 41.69 41.11 0.24 0.23 0.68  
Total 2,881 100.00 100.00 0.38 0.38 0.94  
  1. *p < .05; **p < .01, ***p < .001.