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Table 2 Recruitment and demographic, health, lifestyle, social and psychological characteristics by country (weighted unless otherwise specified) 1

From: European project on osteoarthritis: design of a six-cohort study on the personal and societal burden of osteoarthritis in an older European population

  All countries Germany Italy Netherlands Spain Sweden UK p-value
Sample size (unweighted)         
  Invited (n) 4,040 615 638 698 708 789 592  
  Responded (N) 2,942 407 468 574 539 510 444  
  Response rate (%) 72.8 66.2 73.4 82.2 76.1 64.6 75.0  
Demographic characteristics         
Age (mean (SD) range) (unweighted) 74.2 (5.1) 74.4 (5.0) 73.3 (5.2) 75.2 (5.7) 75.0 (5.5) 72.1 (5.0) 75.2 (2.6) <.0001
Age (range in years) (unweighted) 65-85 65-85 65-85 65-85 65-85 65-85 71-80  
Sex (female) (n (%)) (unweighted) 1,527 (51.9) 164 (40.3) 249 (53.2) 317 (55.2) 268 (49.7) 306 (60.0) 222 (50.0) <.0001
Married (yes) (n (%)) 1,934 (63.7) 280 (67.4) 345 (72.8) 341 (57.5) 386 (68.8) 267 (51.5) 315 (69.1) <.0001
Education (≥ secondary education) (n (%)) 1,637 (55.0) 202 (50.1) 105 (22.4) 435 (74.5) 149 (27.6) 391 (76,7) 355 (79.1) <.0001
Health characteristics         
BMI (Mean (SD) in kg/m2) 27.7 (4.4) 27.4 (4.0) 28.1 (4.6) 27.6 (4.5) 28.6 (4.3) 26.2 (4.0) 28.1 (4.6) <.0001
Chronic diseases (≥2) (n (%)) 791 (26.9) 100 (25.4) 111 (22.7) 195 (33.4) 182 (35.1) 109 (20.6) 94 (20.9) <.0001
Physical performance score (mean (SD)) 8.4 (2.7) 8.4 (2.7) 8.7 (2.2) 8.2 (2.8) 8.4 (2.9) 8.5 (2.4) 7.8 (2.9) <.0001
Lifestyle characteristics         
Alcohol consumption (yes) (n (%)) 2224 (74.9) 367 (90.0) 371 (78.1) 462 (80.7) 223 (38.9) 444 (88.8) 357 (79.0) <.0001
Smoking status (n (%))         <.0001
  Never 1,410 (49.5) 199 (50.5) 265 (58.5) 196 (36.9) 299 (58.5) 223 (43.2) 228 (52.8)
  Current 232 (8.5) 28 (7.0) 33 (8.2) 55 (10.5) 51 (9.2) 48 (10.1) 17 (3.7)
  Ex 1,289 (42.0) 180 (42.5) 170 (33.2) 320 (52.5) 189 (32.4) 231 (46.6) 199 (43.5)
Physical activity score (min/day) (median [IQR]) 172 [103–261] 215 [135–312] 238 [131–364] 145 [91–213] 148 [86–214] 160 [107–227] 189 [112–275] <.0001
Social characteristics         
Social network         
  Family (mean (SD)) (0–15) 9.2 (3.2) 9.2 (3.2) 9.9 (2.8) 9.6 (3.3) 9.0 (3.2) 8.6 (3.3) 9.0 (3.2) <.0001
  Friends (mean (SD)) (0–15) 7.6 (3.7) 8.5 (3.6) 7.1 (4.0) 7.7 (3.6) 6.1 (4.0) 8.3 (3.1) 8.5 (3.3) <.0001
Social participation (0–21) (mean (SD)) 5.4 (3.8) 7.2 (3.8) 4.3 (3.6) 4.9 (3.6) 4.6 (3.4) 5.3 (3.6) 7.2 (4.0) <.0001
Psychological characteristics         
MMSE (median[IQR]) 28 [26-29] 29 [28-30] 27 [25-28] 28 [27-29] 28 [26-29] 27 [26-28] 28 [25-29] <.0001
Anxiety (≥8) (n (%)) 568 (20.7) 54 (14.2) 235 (53.1) 88 (16.5) 87 (17.6) 40 (7.3) 64 (16.4) <.0001
Depression (≥8) (n (%)) 332 (11.9) 32 (7.7) 94 (20.9) 70 (12.7) 99 (19.5) 8 (1.2) 29 (7.4) <.0001
Mastery (0–28) (mean (SD)) 19.3 (5.0) 20.5 (4.1) 16.7 (4.5) 18.1 (4.5) 16.9 (4.2) 24.2 (3.9) 19.8 (4.4) <.0001
  1. 1 The n is unweighted. The sample size may vary for some variables, because of missing values. Means and standard deviations (SD) and p-values for country-differences tested with ANOVA are presented for normally distributed continuous variables. Medians and Interquartile ranges (IQR) and p-values for country-differences tested with Kruskal-Wallis test are presented for skewed continuous variables. Percentages and p-values for country-differences tested with the Chi-squared were presented for categorical variables.