Table 6.
WPS baseline scores assessed by defined known-groups: household productivity and daily activities (randomized set, observed cases)
| Instrument a |
Number of days of household work missed over the previous month |
Number of days with household productivity ≤50% at work over the previous month |
Number of days of missed family, social or leisure activities over the previous month |
Number of days with outside help over the previous month |
Rate of arthritis interference with household work productivity over previous month
b
|
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| Worse | Better | Worse | Better | Worse | Better | Worse | Better | Worse | Better | |
| HAQ-DI |
9.97** |
1.60 |
11.97* |
3.74 |
7.28** |
1.43 |
4.82** |
0.67 |
6.75** |
3.22 |
| (cutoff 0.88 and 1.75) |
n = 116 |
n = 116 |
n = 116 |
n = 116 |
n = 116 |
n = 116 |
n = 116 |
n = 116 |
n = 116 |
n = 116 |
| DAS28 (CRP) |
8.44** |
2.70 |
9.26** |
5.60 |
6.00** |
1.58 |
3.68* |
1.07 |
6.11** |
3.70 |
| (cutoff 4.23 and 5.73) |
n = 103 |
n = 101 |
n = 103 |
n = 101 |
n = 103 |
n = 101 |
n = 103 |
n = 101 |
n = 103 |
n = 101 |
| SF-36 PCS |
11.09** |
1.37 |
10.81** |
4.22 |
7.74** |
1.37 |
4.65** |
0.63 |
6.54** |
3.30 |
| (cutoff 27.99 and 38.28) |
n = 101 |
n = 98 |
n = 101 |
n = 98 |
n = 101 |
n = 98 |
n = 101 |
n = 98 |
n = 101 |
n = 98 |
| SF-36 MCS |
10.10** |
2.50 |
11.25** |
5.19 |
7.91** |
0.40 |
5.34** |
0.18 |
6.65** |
3.54 |
| (cutoff 32.76 and 50.78) |
n = 100 |
n = 101 |
n = 100 |
n = 101 |
n = 100 |
n = 101 |
n = 100 |
n = 101 |
n = 100 |
n = 101 |
| PsAQoL |
9.16** |
1.70 |
11.44** |
2.94 |
7.74** |
0.35 |
4.97** |
0.12 |
6.75** |
3.04 |
| (cutoff 6.00 and 16.00) |
n = 104 |
n = 103 |
n = 104 |
n = 103 |
n = 104 |
n = 103 |
n = 104 |
n = 103 |
n = 104 |
n = 103 |
| PASI |
4.69 |
6.21 |
8.18 |
5.68 |
3.08 |
4.35 |
1.81 |
2.21 |
4.40 |
4.89 |
| (cutoff 3.70 and 15.50) | n = 62 | n = 66 | n = 62 | n = 66 | n = 62 | n = 66 | n = 62 | n = 66 | n = 62 | n = 66 |
Data presented as mean. DAS28(CRP), Disease Activity Score – 28-joint count based on C-reactive protein; HAQ-DI, Health Assessment Questionnaire – Disability Index; MCS, mental component summary; PASI, Psoriasis Area and Severity Index; PCS, physical component summary; PsAQoL, Psoriatic Arthritis Quality of Life; SF-36, Short Form-36 items; WPS, Work Productivity Survey. aCutoff points represent the first and third quartiles of baseline scores. Worse state defined for each individual measure as: DAS28(CRP) score ≥ third quartile, HAQ-DI ≥ third quartile, PsAQoL ≥ third quartile, SF-36 MCS ≤ first quartile, SF-36 PCS ≤ first quartile, PASI ≥ third quartile. Better state defined for each individual measure as: DAS28(CRP) score ≤ first quartile, HAQ-DI ≤ first quartile, PsAQoL ≤ first quartile, SF-36 MCS ≥ third quartile, SF-36 PCS ≥ third quartile, PASI ≤ first quartile. bWPS Question 4 is a 0 to 10 scale, where 0 = no interference and 10 = complete interference. **P ≤ 0.001. *P ≤ 0.01. #P ≤ 0.05. Nonparametric bootstrap t method with a variance stabilizing transformation, 10,000 replications.