Skip to main content

Table 2 Frequencies (%) of responses to the SF-12 mental health (MH) and physical health (PH) sub-scale items

From: Differential item functioning of the SF-12 in a population-based regional joint replacement registry

MH Sub-scale
  All of the time Most of the time Some of the time A little of the time None of the time
 M1: Accomplished less than would like 634 (7.2) 1324 (15.0) 2108 (23.9) 1858 (21.1) 2896 (32.8)
 M2: Less careful than usual 564 (6.4) 1240 (14.1) 1998 (22.7) 1841 (20.9) 3177 (36.0)
 M3: Felt calm and peaceful 373 (4.2) 1227 (13.9) 2510 (28.5) 4094 (46.4) 616 (7.0)
 M4: Have a lot of energy 1017 (11.5) 2401 (27.2) 3150 (35.7) 2027 (23.0) 225 (2.6)
 M5: Felt downhearted and depressed 165 (1.9) 595 (6.7) 2254 (25.6) 2860 (32.4) 2946 (33.4)
  Not at all A little bit Moderately Quite a bit Extremely
 M6: Have social limitations 556 (6.3) 1352 (15.3) 2545 (28.9) 1915 (21.7) 2452 (27.8)
PH Sub-scale
  Excellent Very good Good Fair Poor
 P1: General health 150 (1.7) 1021 (11.6) 4181 (47.4) 2892 (32.8) 576 (6.5)
  Yes, limited a lot Yes, limited a little No, not limited at all   
 P2: Limits in moderate activity 5198 (58.9) 3031 (34.4) 591 (6.7)   
 P3: Climbing several flights of stairs 6563 (74.4) 1910 (21.7) 347 (3.9)   
  All of the time Most of the time Some of the time A little of the time None of the time
 P4: Accomplished less than would like 2564 (29.1) 3199 (36.3) 2049 (23.2) 731 (8.3) 277 (3.1)
 P5: Limited in work and activity 2680 (30.4) 3291 (37.3) 1989 (22.6) 633 (7.2) 227 (2.6)
 P6: Have pain with normal work 1825 (20.7) 3942 (44.7) 2118 (24.0) 804 (9.1) 131 (1.5)