Table 1 Cohort attributes by prevalence of low back pain (N = 42785), Thai Cohort Study
Low back pain status and cohort attributes in 2013 (%) | Longitudinal 2009–2013 low back pain dynamicsa | |||
|---|---|---|---|---|
Never ‘No’ 2009 & ‘No’ 2013 | Reverting ‘Yes’ 2009 & ‘No’ 2013 | Incident ‘No’ 2009 & ‘Yes’ 2013 | Chronic ‘Yes’ 2009 & ‘Yes’ 2013 | |
Low back pain | 36.8 [14768] | 20.0 [8055] | 13.0 [5235] | 30.0 [12042] |
Severe low back pain restricting activitiesb | 95.3 [38260] | 1.7 [701] | 2.3 [922] | 0.7 [271] |
Sex | ||||
Male (45.1%) | 38.1 | 19.1 | 13.4 | 29.5 |
Female (54.8%) | 35.8 | 20.9 | 12.8 | 30.5 |
Age group, years | ||||
< 35 (28.4%) | 36.3 | 20.6 | 13.3 | 29.9 |
35–44 (45.5%) | 35.8 | 20.5 | 13.2 | 30.4 |
45+ (30.2%) | 38.8 | 19.0 | 12.6 | 29.7 |
Residence | ||||
Urban (55.3%) | 35.6 | 19.6 | 13.3 | 31.4 |
Rural (44.7%) | 37.7 | 20.5 | 12.8 | 28.9 |
Occupation | ||||
Professional and managers (40.3%) | 38.5 | 20.0 | 13.3 | 27.9 |
Office assistant (30.5%) | 36.4 | 20.9 | 12.6 | 30.2 |
Skilled worker/elementary (18.7%) | 32.5 | 19.1 | 13.6 | 34.9 |
Others/not working (10.4%) | 38.4 | 19.8 | 13.5 | 29.4 |
Work hours per week | ||||
< 25 (7.2%) | 34.8 | 19.8 | 13.5 | 31.8 |
25–40 (34.2%) | 38.6 | 20.4 | 13.1 | 27.8 |
40+ (43.9%) | 35.6 | 19.8 | 13.1 | 31.4 |
Not working (14.5%) | 36.9 | 20.2 | 12.4 | 30.4 |
Household monthly income | ||||
≤ 10,000 Baht (12.4%) | 32.8 | 18.9 | 12.6 | 35.7 |
> 10,000 to 30,000 Baht (41.6%) | 34.9 | 20.5 | 13.1 | 31.6 |
> 30,000 Baht (45.8%) | 39.6 | 20.0 | 13.2 | 27.2 |
Hours sitting per day | ||||
0–4 (25.4%) | 36.6 | 20.1 | 12.6 | 30.7 |
5–8 (46.6%) | 37.4 | 20.2 | 13.1 | 29.3 |
> 8 (27.8%) | 36.1 | 19.9 | 13.4 | 30.6 |
Hours standing per day | ||||
0–4 (70.9%) | 37.4 | 20.0 | 13.3 | 29.3 |
5–8 (22.9%) | 35.7 | 20.7 | 12.2 | 31.4 |
> 8 (6.1%) | 33.7 | 19.2 | 13.2 | 33.9 |
Physical activity sessions per weekc | ||||
< 3 (50.2%) | 35.7 | 19.9 | 13.5 | 30.9 |
3–6 (37.5%) | 38.2 | 20.5 | 12.9 | 28.5 |
7+ (12.2%) | 37.5 | 19.7 | 11.8 | 31.0 |
Body mass index (Asian cut offs) | ||||
Underweight: BMI < 18.5 (5.7%) | 37.6 | 21.6 | 12.1 | 28.7 |
Normal: BMI 18.5 to <23 (43.7%) | 38.0 | 19.8 | 12.9 | 29.4 |
Overweight: BMI 23 to <25 (21.7%) | 36.2 | 20.4 | 13.6 | 29.8 |
Obese I: BMI 25 to <30 (23.4%) | 34.9 | 19.5 | 13.7 | 31.9 |
Obese II: BMI 30+ (5.3%) | 32.4 | 20.7 | 13.0 | 34.0 |