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Table 1 Characteristics of participants in the overall survival analysis

From: Coming home to die? the association between migration and mortality in rural South Africa

Age (years)       
Variable Total
N = 41,517
External in-migrants
n = 7,867
Internal migrants
n = 4,403
Out-migrants
11,476
Residents
n = 17,771
P-value
Median 28 28 28 24 33  
Internal Quartile 22 – 39 23 – 36 22 – 37 21–31 22 – 45  
Range       
Sex       
Female 23,372 (56.3%) 4,371 (55.6%) 2,804 (63.7%) 5,865 (51.1%) 10,332 (58.1%) <0.001
Male 18,145 (43.7%) 3,496 (44.4%) 1,599 (36.3%) 5,611 (48.9%) 7,439 (41.9%)  
Education       
Grade 1 to 4 6,790 (16.4%) 1,018 (12.9%) 670 (15.2%) 1,036 (9.0%) 4,066 (22.9%)  
Grade 5 to 12 26,733 (64.4%) 5,001 (63.6%) 2,803 (63.7) 7,309 (63.7%) 11,620 (65.4%)  
Tertiary 275 (0.7%) 15 (0.2%) 14 (0.3%) 112 (1.0%) 134 (0.8%) <0.001
Don't know 2,295 (5.5%) 478 (6.1%) 290 (6.6%) 605 (5.3%) 922 (5.2%)  
Missing 5,424 (13.1%) 1,355 (17.2%) 626 (14.2%) 2,414 (21.0%) 1,029 (5.8%)  
Age category:       
18 to 25 17,484 (42.1%) 3,051 (38.8%) 1,801 (40.9%) 6,384 (55.6%) 6,248 (35.2%)  
26 to 40 14,380 (34.6%) 3,410 (43.4%) 1,767 (40.1%) 3,910 (34.1%) 5,293 (29.8%) <0.001
41 to 60 9,653 (23.3%) 1,406 (17.9%) 835 (19.0%) 1,182 (10.3%) 6,230 (35.1%)  
Economic status       
< 7 assets 18,735 (45.1%) 3,605 (45.8%) 2,312 (52.5%) 4,605 (40.1%) 8,213 (44.2%)  
>= 7 assets 19,744 (47.6%) 3,755 (47.7%) 1,670 (37.9%) 5,413 (47.2%) 8,906 (50.1% <0.001
Missing 3,038 (7.3%) 507 (6.4%) 421 (9.6%) 1,458 (12.7%) 652 (3.7)%  
Mortality rate/1000 person years 22.5 42.0 26.5 8.6 20.2  
  1. P-value measures the association between each of the variables and migration status