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Table 1 Participant characteristics at baseline and subsequent follow ups across trajectory groups, mean (SD) or percentage (n = 4952, repeated measurements = 17,710)

From: Trajectories of self-reported physical activity and predictors during the transition to old age: a 20-year cohort study of British men

  Low decreasing (n = 1218) Light stable (n = 2530) Moderate increasing (n = 1204)
  1978/80 1992 1996 2000 1978/80 1992 1996 2000 1978/80 1992 1996 2000
Time-stable
 Age (mean ± SD) 50.4 (5.6)     49.0 (5.6)     48.2 (5.3)    
 Manual occupation (%, n) 62.7 (764)     57.6 (1457)     38.8 (467)    
 Children ≥1 at baseline (%, n) 62.9 (766)     71.7 (1815)     73.2 (881)    
 Resident in South of England at baseline (%, n) 24.0 (292)     36.1 (913)     34.8 (419)    
 Overweight/obese at baseline (%, n) 60.1 (732)     52.9 (1339)     48.1 (579)    
 Married/previously married at baseline (%, n) 94.8 (1154)     96.4 (2438)     97.6 (1175)    
 Chest pain at baseline (%, n) 8.7 (106)     4.6 (115)     3.2 (39)    
 Breathlessness at baseline (%, n) 9.9 (120)     2.2 (55)     0.7 (8)    
 Arthritis at baseline (%, n) 13.9 (169)     7.4 (187)     6.6 (79)    
 High blood pressure at baseline (%, n) 14.7 (179)     9.1 (229)     8.4 (101)    
 Bronchitis at baseline (%, n) 22.2 (270)     13.6 (345)     10.6 (128)    
 Breakfast cereal consumption ≥2/week at baseline (%, n) 34.7 (423)     53.5 (1354)     58.5 (704)    
 Alcohol consumption (≥lighta) (%, n) 68.1 (829)     68.5 (1734)     77.3 (931)    
 Current smokers (%, n) 54.1 (659)     30.0 (760)     22.9 (276)    
Time-varying
 Completed PA Questionnaireb (n) 1204 1150 1126 849 2512 2434 2391 2034 1202 1168 1146 1042
  ≥ Light Activityc (%, n) 34.6 (417) 26.6 (306) 7.1 (80) 8.4 (71) 66.0 (1659) 74.2 (1806) 65.1 (1557) 72.5 (1475) 90.1 (1083) 98.1 (1146) 98.3 (1127) 98.9 (1030)
 High sport participationd (%, n) 17.8 (217) 7.5 (87) 4.4 (51) 5.5 (47) 40.1 (1014) 33.4 (814) 32.3 (765) 41.3 (844) 80.1 (964) 92.2 (1090) 93.7 (1089) 94.9 (989)
 High recreational activitye (%, n) 36.0 (437) 26.7 (315) 7.6 (87) 6.5 (55) 58.0 (1465) 61.4 (1517) 39.5 (949) 39.0 (799) 66.1 (796) 74.5 (880) 61.5 (707) 63.4 (663)
 High walkingf (%, n) 19.4 (234) 32.6 (376) 22.1 (259) 31.9 (276) 29.9 (752) 56.6 (1377) 56.0 (1373) 67.5 (1392) 29.3 (353) 59.7 (688) 58.6 (686) 73.0 (766)
 Not in employment† (%, n) 6.5 (79) 71.6 (836) 83.9 (985) 88.2 (751) 2.9 (73) 56.5 (1390) 71.8 (1748) 81.2 (1656) 1.6 (19) 52.0 (611) 69.0 (806) 79.1 (828)
 CVD conditions ≥1† (%, n) 5.3 (64) 23.4 (256) 28.5 (334) 32.1 (276) 2.6 (66) 15.5 (366) 19.4 (473) 22.4 (457) 2.5 (30) 12.1 (139) 15.8 (184) 18.6 (194)
  1. alight classified as ≥1 unit per week
  2. bmen with a complete physical activity (PA) score at each follow up
  3. cmen classified as having at least light physical activity (scoring ≥2)
  4. dhigh sport was classified as reporting at least occasional participation (less than once a month)
  5. ehigh recreational activity was classified as >4 h/weekend on recreational activities
  6. fhigh walking was classified as >20 mins/day
  7. †total number with complete data on employment, CVD conditions and on physical activity types differs to that of the total number with complete PA questionnaire data at each follow up