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Table 1 Characteristics of study participants

From: Association between single nucleotide polymorphism of rs1937 in TFAM gene and longevity among the elderly Chinese population: based on the CLHLS study

Characteristics Long-lived individuals Younger elderly p value
No. of participants 1907 1387  
Genotype    0.006
 GG 1322 (69.3) 1017 (73.3)  
 GC 525 (27.5) 346 (24.9)  
 CC 60 (3.1) 24 (1.7)  
Age, median (IQR), years 94.0 (91.0–99.0) 70.0 (67.0–72.0) < 0.001
Sex    < 0.001
 Men 701 (36.8) 766 (55.2)  
 Women 1206 (63.2) 621 (44.8)  
Body mass index (kg/m2)    < 0.001
 Underweight 792 (41.5) 233 (16.8)  
 Normal weight 948 (49.7) 791 (57.0)  
 Overweight or obesity 167 (8.8) 363 (26.2)  
Educationa    < 0.001
 Illiteracy 1422 (74.7) 472 (34.1)  
 Literacy 482 (25.3) 914 (65.9)  
Living alone    < 0.001
 No 1601 (84.0) 1227 (88.5)  
 Yes 306 (16.0) 160 (11.5)  
Current smoking    < 0.001
 No 1640 (86.0) 986 (71.1)  
 Yes 267 (14.0) 401(28.9)  
Current drinking    < 0.001
 No 1581 (82.9) 1037 (74.8)  
 Yes 326 (17.1) 350 (25.2)  
Multimorbidity    < 0.001
 No 1537 (80.6) 967 (69.8)  
 Yes 370 (19.4) 419 (30.2)  
  1. IQR interquartile range
  2. aLiteracy was defined as receiving a formal education of more than one year, illiteracy was defined as receiving a formal education of less than one year
  3. Values are numbers (percentages) unless stated otherwise