Table 3.
Cohort demographics stratified by disease group.
| Characteristics | Total (N=964) | Inflammatory bowel disease (N=247) | Multiple sclerosis (N=255) | Rheumatoid arthritis (N=154) | Depression/anxiety disorder (N=308) | P value | |
| Age in years, mean (SDa) | 49.2 (14.2) | 47.4 (14.8) | 51.1 (12.9) | 59.5 (11.7) | 43.9 (13.0) | ||
| Sex, n (%) | <.001 | ||||||
| Male | 235 (24.4) | 92 (37.2) | 47 (18.4) | 24 (15.6) | 72 (23.5) | ||
| Female | 729 (75.6) | 155 (62.7) | 208 (81.6) | 130 (84.4) | 235 (76.6) | ||
| Ethnicity, n (%) | |||||||
| White | 786 (81.9) | 210 (85.4) | 217 (85.4) | 114 (74.5) | 245 (79.8) | .01 | |
| Other | 174 (18.1) | 36 (14.6) | 37 (14.5) | 39 (25.5) | 62 (20.2) | ||
| Missing | 4 | 1 | 1 | 1 | 1 | ||
| Education, n (%) | .06 | ||||||
| Elementary school | 5 (0.5) | 0 (0) | 1 (0.4) | 3 (1.9) | 1 (0.3) | ||
| Middle school | 44 (4.5) | 8 (3.2) | 9 (3.5) | 11 (7.1) | 16 (5.2) | ||
| High school or GEDb | 268 (27.8) | 68 (27.5) | 78 (30.6) | 37 (24.0) | 85 (27.6) | ||
| College | 253 (26.2) | 51 (20.6) | 72 (28.2) | 45 (29.2) | 85 (27.6) | ||
| Technical or trade | 107 (11.1) | 32 (13.0) | 29 (11.4) | 19 (12.3) | 27 (8.8) | ||
| Bachelor’s degree | 215 (22.3) | 60 (24.3) | 56 (22.0) | 27 (17.5) | 72 (23.4) | ||
| Master’s degree | 54 (5.6) | 21 (8.5) | 7 (2.8) | 10 (6.5) | 16 (5.2) | ||
| Doctoral degree | 18 (1.9) | 7 (2.8) | 3 (1.2) | 2 (1.3) | 6 (1.9) | ||
| Annual income, n (%) | <.001 | ||||||
| Less than Can $15,000 | 100 (10.4) | 14 (5.7) | 20 (7.8) | 19 (12.3) | 47 (15.3) | ||
| Can $15,000-29,999 | 88 (9.1) | 14 (5.7) | 24 (9.4) | 19 (12.3) | 31 (10.1) | ||
| Can $30,000-49,999 | 162 (16.8) | 29 (11.7) | 37 (14.5) | 32 (20.8) | 64 (20.8) | ||
| Can $50,000-100,000 | 341 (35.4) | 104 (42.1) | 99 (38.8) | 48 (31.2) | 90 (29.2) | ||
| More than Can $100,000 | 189 (19.6) | 68 (27.5) | 47 (18.4) | 25 (16.2) | 49 (15.9) | ||
| I do not wish to answer | 84 (8.7) | 18 (7.3) | 28 (11.0) | 11 (7.1) | 27 (8.8) | ||
| Marital status, n (%) | <.001 | ||||||
| Single or never married | 217 (22.5) | 56 (22.7) | 30 (11.8) | 20 (13.0) | 111 (36.0) | ||
| Married or common law | 569 (59.0) | 160 (64.8) | 182 (71.4) | 93 (60.4) | 134 (43.5) | ||
| Divorced or separated | 150 (15.6) | 24 (9.7) | 39 (15.3) | 31 (20.1) | 56 (18.2) | ||
| Widowed | 28 (2.9) | 7 (2.8) | 4 (1.6) | 10 (6.5) | 7 (2.3) | ||
aSD: standard deviation.
bGED: General Education Diploma.