Table 3.
Demographic and employment characteristics (categorical variables)
| Variable | Frequency (%) |
|---|---|
| Age quartiles | |
| <43 yrs | 29/115 (25.2) |
| 43–51 | 31/115 (27.0) |
| 52–62 | 31/115 (27.0) |
| >62 | 24/115 (20.9) |
| Age <50 yrs | 53/115 (46.1) |
| Female | 56/115 (48.7) |
| Marital status | |
| Married | 86/115 (74.8) |
| Separated | 1/115 (0.9) |
| Divorced | 8/115 (7.0) |
| Widowed | 4/115 (3.5) |
| Never married | 16/115 (13.9) |
| Education | |
| Did not complete grade | 12 21/115 (18.3) |
| Completed grade | 12 30/115 (26.1) |
| Trade school | 34/115 (29.6) |
| Some university | 19/115 (16.5) |
| University degree | 9/115 (7.8) |
| Graduate degree | 2/115 (1.7) |
| Income | |
| <15 K | 10/109 (9.2) |
| 15–29,999 K | 10/109 (9.2) |
| 30–59,999 K | 38/109 (34.9) |
| 60 K–99,999 | 31/109 (28.4) |
| ≥100 K | 20/109 (18.3) |
| Employment | |
| Paid full time | 62/115 (53.9) |
| Paid part time | 17/115 (14.8) |
| Unemployed | 5/115 (4.3) |
| Housework | 9/115 (7.8) |
| Disabled | 4/115 (3.5) |
| Student | 2/115 (1.7) |
| Retired | 16/115 (13.9) |
| Not working due to back pain | 22/115 (19.1) |
| Back pain caused by work | 42/115 (36.5) |
| Rurala | 77/115 (70.0) |
| Farmer | 32/115 (27.8) |
a
Note: Rural residence defined as weak or no Metropolitan Influenced Zones.65