Table 1.
Baseline Demographic and Clinical Characteristics of the Study Sample
| AC | (DA) | (MI) | DA + MI | |||
|---|---|---|---|---|---|---|
| N=161 | N=162 | N=158 | N=158 | |||
|
| ||||||
| Demographics | Statistic F(3,635)1 | p | ||||
| Age, Mean(SD) | 61.28 (8.29) | 60.70 (9.27) | 61.35 (8.73) | 60.94 (8.31) | 0.19 | 0.90 |
| chi-square2 | p | |||||
| Male, n (%) | 152 (94) | 150 (93) | 148 (94) | 149 (94) | 0.57 | 0.90 |
| Education - Less than high school, n (%) | 41 (25) | 39 (24) | 33 (21) | 41 (26) | 1.35 | 0.72 |
| Employment - Currently working, n (%) | 35 (22) | 32 (20) | 37 (23) | 37 (23) | 0.85 | 0.84 |
| Marital Status - Currently married, n (%) | 45 (28) | 70 (43) | 54 (34) | 51 (32) | 8.85 | 0.03 |
| Living Situation - Lives alone, n (%) | 72 (45) | 57 (35) | 77 (46) | 74 (47) | - | 5.13 |
| Household Income <15K, n (%) | 88 (57) | 75 (50) | 65 (44) | 79 (55) | 6.16 | 0.10 |
|
| ||||||
| Clinical Covariates | F(3,635)3 | p | ||||
|
| ||||||
| WOMAC, Mean (SD)4 | 59.08 (14.08) | 57.15 (14.56) | 56.36 (14.85) | 56.47 (13.98) | 1.19 | 0.31 |
| Arthritis Self Efficacy: | ||||||
| Pain, Mean(SD)5 | 24.42 (10.08) | 25.93 (9.76) | 25.69 (9.02) | 26.63 (9.58) | 1.46 | 0.23 |
| Function, Mean(SD)6 | 57.41 (16.92) | 60.57 (17.29) | 57.47 (17.99) | 55.93 (17.56) | 2.01 | 0.11 |
| Cumulative Illness Scale7 | 2.83 (2.07) | 2.85 (2.03) | 2.88 (1.90) | 3.09 (2.30) | 0.57 | 0.64 |
| SF-12, Mean(SD) | ||||||
| Physical Component | 32.72 (9.07) | 33.46 (8.76) | 32.56 (9.06) | 33.37 (9.39) | 0.38 | 0.77 |
| Mental Component | 45.33 (13.69) | 46.38 (12.49) | 45.79 (12.12) | 45.69 (12.02) | 0.18 | 0.91 |
| Trust in Physician: Mean(SD)8 | 29.18 (3.34) | 29.01 (3.36) | 29.03 (3.01) | 28.92 (3.92) | 0.16 | 0.92 |
AC= Attention Control; DA= Decision Aid; MI= Motivational Interview; SD= Standard Deviation
F (3,365) statistic based comparisons among the 4 groups with analyses of variance
chi-square2 statistic for categorical variables (df=3)
F statistics in these measures had slight variations in the number of observations, range varied from 613-637 observations.
Range: 0-100;
Range: 5-50;
Range: 9-90;
Range: 0-17;
Range: 11-55
Chi-square tests (3df) were used for categorical variables. There are slight variations in the number of subjects that provided some of the demographic information. The largest number of missing data is in the income variable where 43 subjects did not provide responses.
The video only group differs from each of the other 3 groups
(p=0.03)