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Table 1 Sociodemographic description of the study population

From: Norm values and psychometric properties of the brief symptom inventory-18 regarding individuals between the ages of 60 and 95

  Male N = 402 Female N = 482 Sum N = 884 Statistical testing
Age 70.19 ± 6.62 71.22 ± 7.41 70.75 ± 7.08 t = − 2.17 p < .03
   Range = 60–95  
Age Groups     χ2 = 19.1 p < .001
 60–64 84 (21%) 108 (22%) 192 (22%)  
 65–69 113 (28%) 108 (22%) 221 (25%)
 70–74 116 (29%) 103 (21%) 219 (25%)
 75–79 44 (11%) 89 (19%) 133 (15%)
 ≥ 80 45 (11%) 74 (15%) 119 (14%)
Marital status     χ2 = 91.2 p < .0001
 Single 13 (3%) 10 (2%) 23 (3%)  
 Married 292 (73%) 208 (44%) 500 (57%)
 Divorced 27 (7%) 40 (8%) 67 (8%)
 Widowed 70 (17%) 224 (47%) 294 (34%)
Living     χ 2 = 84.84 p < .0001
 With Partner 298 (74%) 209 (43%) 507 (57%)
 Alone 104 (26%) 273 (57%) 377 (43%)
Years of schooling     χ 2 = 30.95 p < .0001
 8 247 (61%) 364 (76%) 611 (70%)
 10 98 (24%) 96 (20%) 194 (22%)  
 13 57 (14%) 22 (5%) 79 (9%)
Work Status     χ 2 = 109.36 p < .0001
 Worker 221 (55%) 165 (34%) 386 (44%)
 Employee 117 (29%) 300 (62%) 417 (47%)  
 Civil 64 (16%) 17 (4%) 81 (9%)
 Servant/Freelancer    
Income     χ2 = 47.8 p < .0001
 < 1250 €/month 63 (17%) 178 (38%) 241 (28%)  
 1250–2500 €/month 266 (70%) 244 (52%) 510 (60%)
 > 2500 €/month 52 (14%) 46 (10%) 98 (12%)
Class index     χ 2 = 31.79 p < .0001
 Lower class 196 (49%) 231 (48%) 427 (48%)
 Middle class 125 (31%) 211 (44%) 336 (38%)  
 Upper class 81 (20%) 40 (8%) 121 (14%)