Demographics characteristics of those who do and do not use probiotics
| Characteristics | Probiotics N=130 (27%) | No probiotics N=349 (73%) | P value† |
| Age (years) | 0.25 | ||
| 20–50 | 52 (31%) | 115 (69%) | |
| 51–65 | 48 (27%) | 127 (73%) | |
| ≥66 | 28 (29%) | 97 (77%) | |
| Language | 0.64 | ||
| English | 124 (27%) | 329 (73%) | |
| Spanish only | 6 (23%) | 20 (77%) | |
| Race | 0.60 | ||
| White | 80 (26%) | 223 (74%) | |
| Hispanic | 24 (24%) | 76 (76%) | |
| Black | 11 (29%) | 27 (71%) | |
| Other | 13 (40%) | 19 (59%) | |
| Ethnicity | 0.60 | ||
| Non-Hispanic | 69 (28%) | 176 (72%) | |
| Hispanic | 26 (23%) | 85 (77%) | |
| Other | 32 (29%) | 80 (71%) | |
| Married | 75 (26%) | 213 (74%) | 0.53 |
| Children | 0.13 | ||
| No children | 45 (32%) | 95 (68%) | |
| 1–2 children | 58 (27%) | 153 (73%) | |
| ≥3 children | 27 (21%) | 101 (79%) | |
| Household members | 0.76 | ||
| 1 other person | 29 (30%) | 68 (70%) | |
| 2–3 other people | 71 (26%) | 202 (74%) | |
| ≥4 other people | 30 (27%) | 79 (73%) | |
| Dog owner | 41 (33%) | 83 (67%) | 0.08 |
| Cat owner | 18 (30%) | 43 (70%) | 0.62 |
| Educational level | 0.73 | ||
| College graduate | 81 (27%) | 224 (73%) | |
| Not college graduate | 46 (28%) | 118 (72%) | |
| Insurance status | 0.34 | ||
| Medicare/Medicaid | 36 (24%) | 113 (76%) | |
| Commercial insurance | 89 (28%) | 225 (72%) | |
| Income* | 0.78 | ||
| US$21 542–56 863 | 43 (28%) | 109 (72%) | |
| US$58 331–97 286 | 43 (29%) | 104 (71%) | |
| > US$97 920 | 38 (26%) | 110 (74%) |
*Estimated based on median income from zip code of residence. Column totals are unequal due to rare missing data.
†χ2 test.