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Table 1 Characteristics of the participants by physical and mental component summary score quintiles of the SF-12

From: Association between physical and mental health-related quality of life and adverse outcomes; a retrospective cohort study of 5,272 Scottish adults

  Physical component quintile (score) Mental component quintile (score)
  1 (<42) 2 (42–50.9) 3 (51–54.9) 4 (55–56) 5 (>56)   1 (<47) 2 (47–52.9) 3 (53–55.9) 4 (56–58) 5 (>58)  
  N = 1,055 N = 1,054 N = 1,057 N = 1,068 N = 1,038   N = 1,055 N = 1,054 N = 1,057 N = 1,068 N = 1,038  
  N (%) N (%) N (%) N (%) N (%) P value N (%) N (%) N (%) N (%) N (%) P value
Body Mass Index             
Underweight 24 (2.3) 4 (0.38) 9 (0.85) 11 (1.0) 11 (1.1) <0.001 21 (2.0) 4 (0.4) 15 (1.4) 11 (1.0) 8 (0.8) 0.045
Normal-weight 251 (23.8) 287 (27.2) 330 (31.2) 358 (33.5) 463 (44.6)   338 (31.7) 365 (34.0) 379 (36.0) 358 (32.6) 249 (25.4)  
Overweight 369 (35.0) 416 (39.5) 445 (42.1) 496 (46.4) 426 (41.0)   391 (36.7) 435 (40.5) 441 (41.9) 484 (44.0) 401 (40.9)  
Obese 411 (39.0) 347 (32.9) 273 (25.8) 203 (19.0) 138 (13.3)   315 (29.6) 271 (25.2) 217 (20.6) 247 (22.5) 322 (32.9)  
Class I 261 (24.7) 222 (21.1) 202 (19.1) 148 (13.9) 107 (10.3)   184 (17.3) 190 (17.7) 162 (15.4) 171 (15.6) 233 (23.8)  
Class II 95 (9.0) 95 (9.0) 48 (4.5) 34 (3.2) 25 (2.4)   81 (7.6) 54 (5.0) 39 (3.7) 56 (5.1) 67 (6.8)  
Class III 55 (5.2) 30 (2.9) 23 (2.2) 21 (2.0) 6 (0.6)   50 (4.7) 27 (2.5) 16 (1.5) 20 (1.8) 22 (2.2)  
Sex             
Men 463 (43.9) 476 (45.2) 508 (48.1) 508 (47.6) 428 (41.2) <0.001 419 (39.3) 448 (41.7) 488 (46.4) 532 (48.4) 496 (50.6) <0.001
Women 592 (56.1) 578 (54.8) 549 (51.9) 560 (52.4) 610 (58.8)   646 (60.7) 627 (58.3) 564 (53.6) 568 (51.6) 484 (49.4)  
Age (years)             
20-44 201 (19.1) 404 (38.3) 507 (48.0) 527 (49.3) 573 ( 55.2) <0.001 473 (44.4) 508 (47.3) 518 (49.2) 484 (44.0) 229 (23.4) <0.001
45-64 419 (39.7) 400 (38.0) 395 (37.4) 403 (37.7) 389 (37.5)   409 (38.4) 422 (39.3) 386 (36.7) 416 (37.8) 373 (38.1)  
≥65 435 (41.2) 250 (23.7) 155 (14.7) 138 (12.9) 76 (7.3)   183 (17.2) 145 (13.5) 148 (14.1) 200 (18.2) 378 (38.6)  
SIMD             
1 (most deprived) 267 (25.3) 197 (18.7) 153 (14.5) 157 (14.5) 105 (10.1) <0.001 246 (23.1) 182 (16.9) 154 (14.6) 145 (13.2) 152 (15.5) <0.001
2 247 (23.4) 197 (18.7) 204 (19.3) 179 (16.8) 168 (16.8)   233 (21.9) 187 (17.4) 182 (17.3) 196 (17.8) 197 (20.1)  
3 238 (22.6) 254 (24.1) 257 (24.3) 220 (20.6) 253 (24.4)   253 (23.8) 235 (21.7) 234 (22.2) 253 (23.0) 247 (25.2)  
4 189 (17.9) 209 (19.8) 230 (21.8) 248 (23.2) 252 (24.3)   198 (18.6) 240 (22.3) 234 (22.2) 223 (20.3) 233 (23.8)  
5 (least deprived) 114 (10.8) 197 (18.7) 213 (20.2) 264 (24.7) 260 (25.1)   135 (12.7) 231 (21.5) 248 (23.6) 283 (25.7) 151 (15.4)  
Education a             
Level 1 139 (13.2) 168 (15.9) 170 (16.1) 187 (17.5) 169 (16.3) <0.001 170 (15.7) 185 (17.2) 175 (16.6) 166 (15.1) 137 (14.0) 0.015
Level 2 143 (13.6) 163 (15.5) 193 (18.3) 198 (18.5) 200 (19.3)   167 (15.7) 175 (16.3) 211 (20.1) 209 (19.0) 135 (13. 8)  
Level 2 32 (3.0) 77 (7.31) 78 (7.4) 92 (8.6) 93 (9.0)   167 (7.8) 175 (6.1) 211 (7.5) 209 (8.3) 135 (5.5)  
Level 4 151 (14.3) 210 (19.9) 290 (27.4) 314 (29.4) 400 (38.5)   224 (21.0) 321 (29.9) 326 (31.0) 289 (26.3) 205 (20.9)  
None of these 590 (55.9) 436 (41.4) 326 (30.8) 277 (25.9) 176 (17.0)   421 (39.5) 329 (30.6) 261 (24.8) 345 (31.4) 449 (45.8)  
Smoking status             
Never 361 (34.2) 441 (41.9) 447 (42.3) 526 (49.3) 541 (52.1) <0.001 390 (36.6) 465 (43.3) 490 (46.6) 536 (48.7) 435 (44.4) <0.001
Previous 387 (36.7) 317 (30.1) 296 (28.0) 306 (28.7) 258 (24.9)   268 (25.2) 311 (28.9) 318 (30.2) 319 (29.0) 348 (35.5)  
Current 307 (29.1) 296 (28.1) 314 (29.7) 236 (22.1) 239 (23.0)   407 (38.2) 299 (27.8) 244 (23.2) 245 (22.3) 197 (20.1)  
Alcohol consumption             
Never 92 (8.7) 53 (5.03) 36 (3.4) 39 (3.7) 32 (3.1) <0.001 53 (5.0) 41 (3.8) 34 (3.2) 42 (3.8) 82 (8.4) 0.016
Previous 99 (9.4) 39 (3.7) 36 (3.4) 26 (2.4) 25 (2.4)   75 (7.0) 39 (3.6) 35 (3.3) 37 (3.4) 39 (4.0)  
Within limit 704 (66.7) 739 (70.1) 733 (69.4) 802 (75.1) 721 (69.5)   687 (64.5) 774 (72.0) 748 (71.1) 812 (73.8) 678 (69.2)  
Excessive 160 (15.2) 223 (21.2) 252 (23.8) 201 (18.8) 260 (25.1)   250 (23.5) 221 (20.6) 235 (22.3) 209 (19.0) 181 (18.5)  
Medical comorbidity             
No 576 (54.6) 725 (68.8) 829 (78.4) 886 (83.0) 940 (90.6) <0.001 734 (68.9) 836 (77.8) 859 (81.7) 879 (79.9) 648 (66.1) <0.001
Yes 479 (45.4) 329 (31.2) 228 (21.6) 182 (17.0) 98 (9.4)   331 (31.1) 239 (22.2) 193 (18.4) 221 (20.1) 332 (33.9)  
  1. P values were determined by χ2 test; SIMD, Scottish index of multiple deprivations; a1 (Lower than O level Grade C), 2 (O level or equivalent), 3 (A level/other below degree), 4 (Degree level or above).