Table 1.
Characteristics of 5879 men aged 65 and over with and without incident rib fracture (MrOS Study). Values are numbers (percentages) unless stated otherwise
| Characteristics | No incident rib fracture (n=5753) | Incident rib fracture (n=126) | P value* |
|---|---|---|---|
| Age (years): | |||
| 65-69 | 1714 (29.8) | 36 (29) | 0.08 |
| 70-74 | 1652 (28.7) | 27 (21) | |
| 75-79 | 1384 (24.1) | 31 (25) | |
| ≥80 | 1003 (17.4) | 32 (25) | |
| Clinic site: | |||
| Birmingham | 939 (16.3) | 13 (10) | 0.1 |
| Minneapolis | 973 (16.9) | 17 (13) | |
| Palo Alto | 944 (16.4) | 30 (24) | |
| Pittsburgh | 974 (16.9) | 20 (16) | |
| Portland | 967 (16.8) | 26 (21) | |
| San Diego | 956 (16.6) | 20 (16) | |
| Race/ethnicity: | |||
| White | 5138 (89.3) | 118 (94) | 0.4 |
| Black | 240 (4.2) | 2 (2) | |
| Asian | 184 (3.2) | 4 (3) | |
| Hispanic | 121 (2.1) | 2 (2) | |
| Other | 70 (1.2) | 0 | |
| Married | 4739 (82.4) | 103 (82) | 0.9 |
| College graduate | 3060 (53.2) | 61 (48) | 0.3 |
| Overall health†: | |||
| Very poor to fair | 806 (14.0) | 16 (13) | 0.7 |
| Good or excellent | 4945 (86.0) | 110 (87) | |
| Body size: | |||
| Mean (SD) height (cm) | 174.2 (6.8) | 173.1 (6.6) | 0.07 |
| Mean (SD) weight (kg) | 83.3 (13.3) | 80.7 (12.9) | 0.03 |
| Mean (SD) body mass index (kg/m2) | 27.4 (3.8) | 26.9 (3.9) | 0.1 |
| Mean (SD) weight change since age 25 (kg) | 10.4 (11.4) | 10.0 (11.2) | 0.6 |
| Mean (SD) height at age 25 (cm) | 177.9 (6.9) | 177.6 (6.6) | 0.6 |
| Mean (SD) total hip bone mineral density (g/cm2) | 0.96 (0.14) | 0.91 (0.14) | <0.0001 |
| Mean (SD) total hip bone mineral density t score | −0.55 (0.97) | −0.94 (0.96) | <0.0001 |
| Alcohol use in past year†: | |||
| None | 2027 (35.3) | 47 (37) | 0.6 |
| 1-7 drinks/week | 2723 (47.4) | 54 (43) | |
| >7 drinks/week | 995 (17.3) | 25 (20) | |
| Smoking†: | |||
| Ever | 3587 (62.4) | 85 (67) | 0.2 |
| Never | 2165 (37.6) | 41 (33) | |
| Mean (SD) pack years | 28.9 (25.6) | 30.4 (27.4) | 0.8 |
*P values are for differences in rib fracture case status by χ2 or Fisher’s exact test for categorical variables, two sided t tests for normally distributed continuous variables, and Wilcoxon rank-sum test for skewed continuous variables.
†Numbers in the “No incident rib fracture” column do not total to 5753 owing to a small number of missing values.