Table 3.
Associations with new recording of challenging behaviour in adults with intellectual disability in UK primary care, 1999-2013
| Factor | Rate (per 10 000 patient years) (95% CI) | Incidence rate ratio* (95% CI) | P value |
|---|---|---|---|
| Sex: | |||
| Male | 243 (231 to 255) | 1 (reference) | NS |
| Female | 235 (225 to 246) | 0.97 (0.91 to 1.04) | |
| Age group, years: | |||
| 18-29 | 218 (204 to 234) | 1 (reference) | <0.001 |
| 30-39 | 220 (204 to 237) | 1 (0.90 to 1.11) | |
| 40-49 | 226 (211 to 242) | 1.01 (0.91 to 1.12) | |
| 50-59 | 260 (241 to 282) | 1.13 (1.02 to 1.26) | |
| 60-69 | 286 (259 to 316) | 1.27 (1.12 to 1.45) | |
| 70-79 | 304 (262 to 351) | 1.40 (1.18 to 1.65) | |
| ≥80 | 382 (302 to 483) | 1.78 (1.38 to 2.30) | |
| Townsend deprivation fifth: | |||
| 1 (least deprived) | 230 (212 to 251) | 1 (reference) | NS |
| 2 | 247 (229 to 267) | 1.06 (0.95 to 1.20) | |
| 3 | 226 (210 to 244) | 1.02 (0.90 to 1.14) | |
| 4 | 225 (210 to 242) | 0.97 (0.87 to 1.10) | |
| 5 (most deprived) | 264 (246 to 282) | 1.10 (0.98 to 1.25) | |
| Missing | 247 (212 to 288) | 1.08 (0.89 to 1.32) | |
| Neuropsychiatric diagnosis: | |||
| No severe mental illness | 224 (216 to 232) | 1 (reference) | <0.001 |
| Severe mental illness | 442 (403 to 484) | 1.69 (1.53 to 1.88) | |
| No depression | 201 (193 to 209) | 1 (reference) | <0.001 |
| Depression | 399 (376 to 423) | 1.71 (1.58 to 1.86) | |
| No anxiety | 209 (201 to 217) | 1 (reference) | <0.001 |
| Anxiety | 384 (360 to 409) | 1.44 (1.33 to 1.57) | |
| No autism | 227 (219 to 235) | 1 (reference) | <0.001 |
| Autism | 380 (346 to 418) | 1.83 (1.64 to 2.03) | |
| No dementia | 233 (225-240) | 1 (reference) | <0.001 |
| Dementia | 482 (416 to 558) | 1.71 (1.45 to 2.01) | |
| No epilepsy | 225 (217 to 234) | 1 (reference) | <0.001 |
| Epilepsy | 287 (270 to 306) | 1.41 (1.30 to 1.52) |
NS=not significant.
*Adjusted for age, sex, Townsend deprivation fifth, neuropsychiatric diagnoses, and year of study entry.