Table 2.
Baseline Characteristics According to Neuromuscular Impairment Burden Among 365 Boston Rehabilitative Impairment Study of the Elderly Participants
| Neuromuscular Impairment Burden | |||||
|---|---|---|---|---|---|
| 0 (n = 140) | 1 (n = 131) | 2 (n = 63) | 3 (n = 31) | p-Value | |
| Age, years | 74.7 (6.3) | 77.4 (7.1) | 78.3 (6.9) | 78.8 (6.9) | .0002 |
| Sex, female (%) | 92 (65.7) | 87 (66.4) | 46 (73.0) | 20 (64.5) | .74 |
| Race, white (%) | 118 (84.3) | 102 (77.9) | 53 (84.1) | 27 (87.1) | .43 |
| BMI, kg/m2 | 28.2 (5.2) | 29.2 (6.0) | 30.6 (6.0) | 31.1 (6.0) | .01 |
| College education (%) | 91 (65.0) | 75 (57.3) | 33 (52.4) | 9 (29.0) | .003 |
| Activities-specific Balance Confidence Scale | 84.2 (11.3) | 77.5 (13.9) | 70.5 (17.9) | 57.6 (20.5) | <.0001 |
| Physical Activity Scale for the Elderly | 193.5 (67.7) | 171.8 (67.6) | 170 (82.2) | 132.5 (41.7) | <.0001 |
| Brief Pain Inventory | 2.1 (1.7) | 2.5 (1.8) | 2.9 (1.7) | 3.3 (2.3) | .001 |
| MCI subtypes (%) | .39 | ||||
| Amnestic MCI | 17 (12.1) | 19 (14.5) | 10 (15.9) | 9 (29.0) | |
| Non-amnestic MCI | 1 (0.7) | 7 (5.3) | 0 (0) | 3 (9.7) | |
| Multiple domain MCI | 27 (19.3) | 29 (22.1) | 13 (20.6) | 10 (32.3) | |
| Visual deficit (%) | 4 (2.9) | 7 (5.3) | 3 (4.8) | 4 (12.9) | .14 |
| Sensory loss (%) | 37 (26.4) | 36 (27.5) | 21 (34.4) | 14 (46.7) | .13 |
| Comorbidity count | 3.5 (1.7) | 3.9 (1.8) | 4.4 (1.8) | 4.9 (2.1) | .0003 |
| PHQ-9 > 5 (%) | 3 (2.1) | 8 (6.1) | 8 (7.9) | 3 (6.7) | .10 |
| Psychiatric medication use (%) | 37 (26.4) | 40 (30.5) | 16 (25.4) | 13 (41.9) | .32 |
Note: BMI = body mass index; MCI = mild cognitive impairment; PHQ-9 = Patient Health Questionnaire. Mean (SD) or N (%). p-values from analysis of variance, chi-squared test, or Fisher exact test assessing differences across groups.