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Table.1 Characteristics of 54-65 year olds in three birth cohorts (1928-1937, 1938-1947, 1948-1957)

From: Changes in the role of explanatory factors for socioeconomic inequalities in physical performance: a comparative study of three birth cohorts

   28/37-cohort 38/47-cohort 48/57-cohort p Value
  N M (SD) /% M(SD) /% M(SD) /% t/F test
Age 3013 60 (3) 60 (3) 60 (3) <0.01
Sex (0-1)      
Women 3013 516 (52) 527 (53) 527 (52)  
Physical performance (3-12) 2815 8 (2) 9 (2) 9 (2) <0.05
Education (5-18) 3011 9 (3) 10 (3) 12 (3) <0.001
Occupational level      <0.001
Elementary 224 77 (9) 74 (8) 73 (8)  
Low 800 312 (35) 301 (31) 187 (20)  
Medium 1037 341 (38) 351 (36) 345 (36)  
High 565 113 (13) 195 (20) 257 (27)  
Scientific 185 51 (6) 42 (4) 92 (10)  
Income (317-2439) 2904 1065 (458) 1137 (366) 1615 (408) <0.001
Behavioural factors      
Smoking (0-1)      <0.05
No or quit >15 years 1489 436 (49) 486 (53) 567 (64)  
yes or quit </= 15 years 1207 454 (51) 433 (47) 320 (36)  
Alcohol (0-1)      <0.001
<5 172 41 (5) 71 (8) 60 (7)  
>=5 2524 849 (95) 848 (92) 827 (93)  
Physical activity score (0-371)a 2959 65 (64) 55 (54) 53 (49)  
BMI (19-45) 2658 28 (4) 27 (4) 27 (5) <0.001
Social factors      
Divorce (0-1)      <0.001
Yes 279 57 (6) 111 (11) 111 (11)  
Partner status (0-1)      
Yes 2361 774 (78) 799 (80) 788 (77)  
Network size (0-80) 2968 15(8) 15 (9) 20 (11) <0.001
Network complexity (0-11) 2968 5 (2) 5 (2) 6 (2) <0.001
Instrumental support (0-36) 2961 14 (6) 15 (6) 16 (6) <0.001
Emotional support (0-36) 2961 23 (8) 22 (8) 23 (7) <0.01
Psychological factors      
Crystallized intelligence 2855 13 (4) 13 (4) 14 (3) <0.01
Mastery (8-25) 2971 18 (3) 18 (4) 19 (3) <0.001
Self-efficacy (23-59) 2977 43 (5) 43 (6) 45 (6) <0.001
Neuroticism (0-28) 2592 6 (6) 6 (6) 4 (5) <0.001
  1. adue to non-normality median an interquartile range are reported