Low back pain patterns over one year among 842 workers in the DPhacto study and predictors for chronicity based on repetitive measurements

Table 1 Descriptive characteristic of the eight constructed variables of low back pain (N = 842)

Pain variables	Mean	(SD)	Range
Accumulated LBP^a	32.5	(28.8)	0–137
Mean LBP	2.4	(2.1)	0–9.8
Median LBP	2.1	(2.3)	0–10
LBP > 2	5.5	(5.1)	0–14
LBP > 4	2.9	(4.1)	0–14
LBP = 0	5.2	(5.2)	0–14
Standard deviation	1.3	(0.8)	0–4.3
Variation span^b	4.2	(2.7)	0–10

The eight constructed low back pain variables are calculated from the 12–14 repeated measures of low back pain intensity for each worker included from the DPhacto. LBP = low back pain. SD = Standard deviation. Mean and SD presents mean LBP intensity of the eight pain variables
^aAccumulated LBP = summation of all LBP intensity scores for each worker
^b Variation span = numeric difference between the workers highest and lowest LBP intensity rating

ISSN: 1471-2474