Table 1 Scales, items of the SF-36 questionnaire and proportion of missingness and inconsistencies of response
Scales / Items / Inconsistencies | Scores (ordinal Likert) | Missing response n (%) | Inconsistent response n (%) |
|---|---|---|---|
PF (Physical functioning ) | |||
PF1 Vigorous activities | 1 to 3 | 696 (3.0) | |
PF2 Moderate activities | 1 to 3 | 718 (3.1) | |
PF3 Lift, carry groceries | 1 to 3 | 745 (3.2) | |
PF4 Climb several flights | 1 to 3 | 806 (3.5) | |
PF5 Climb one flight | 1 to 3 | 1104 (4.8) | |
PF6 Bend, kneel | 1 to 3 | 746 (3.2) | |
PF7 Walk >1 km | 1 to 3 | 703 (3.1) | |
PF8 Walk several blocks | 1 to 3 | 1020 (4.4) | |
PF9 Walk one block | 1 to 3 | 1212 (5.3) | |
PF10 Bathe, dress | 1 to 3 | 629 (2.7) | |
Inconsistency PF1- PF9 | 487 (2.1) | ||
Inconsistency PF1- PF10 | 615 (2.7) | ||
Inconsistency PF2- PF9 | 448 (1.9) | ||
Inconsistency PF2- PF10 | 505 (2.2) | ||
Inconsistency PF4- PF9 | 405 (1.8) | ||
Inconsistency PF4- PF10 | 524 (2.3) | ||
Inconsistency PF7- PF9 | 288 (1.3) | ||
Inconsistency PF7- PF10 | 434 (1.9) | ||
RP (Role limitations relating to physical health ) | |||
RP1 Cut down time working | 1 to 2 | 722 (3.1) | |
RP2 Accomplished less | 1 to 2 | 722 (3.1) | |
RP3 Limited in type of work | 1 to 2 | 722 (3.1) | |
RP4 Difficulty performing work | 1 to 2 | 722 (3.1) | |
BP (Bodily pain) | |||
BP1 Intensity of bodily pain | 1 to 6 | 547 (2.4) | |
BP2 Extent that pain interferes with work | 1 to 6 | 547 (2.4) | |
Inconsistency BP1- BP2 | 14 (0.1) | ||
GH (General health perceptions) | |||
GH1 General health | 1 to 5 | 1450 (6.3) | |
GH2 Get sick more easily | 1 to 5 | 1451 (6.3) | |
GH3 As healthy as anybody | 1 to 5 | 1365 (5.9) | |
GH4 Expect health to get worse | 1 to 5 | 1390 (6.0) | |
GH5 Health is excellent | 1 to 5 | 1533 (6.7) | |
Inconsistency GH1- GH5 | 23 (0.1) | ||
VT (Vitality) | |||
VT1 Full of life | 1 to 6 | 1275 (5.5) | |
VT2 Energetic | 1 to 6 | 1275 (5.5) | |
VT3 Worn out | 1 to 6 | 1246 (5.4) | |
VT4 Tired | 1 to 6 | 906 (3.9) | |
VT2- VT3 | 543 (2.4) | ||
VT1- VT4 | 536 (2.3) |