Table 2 Days with low back pain (LBP) in the preceding year in a Danish general population aged 40/41 at baseline surveyed 3 times over 8 years
Survey 1 | Survey 2 | Survey 3 | |||||
|---|---|---|---|---|---|---|---|
Including the responders only | Including the responders only | SAME AS BEFORE SCENARIO: Including the non responders categorized under their previous sub-group | WORST CASE SCENARIO: Including the non responders categorized under the worst sub-group (>30) | Including the responders only | SAME AS BEFORE SCENARIO: Including the non responders categorized under their previous sub-group | WORST CASE SCENARIO: Including the non responders categorized under the worst sub-group (>30) | |
N = 412 | N = 348 | N = 412 | N = 412 | N = 293 | N = 348 | N = 348 | |
Number of days with LBP past year | % [95% CI] | % [95% CI] | % [95% CI] | % [95% CI] | % [95% CI] | % [95% CI] | % [95% CI] |
0 | 30 [26–34] | 32 [27–37] | 30 [26–34] | 27 [23–31] | 25 [20–30] | 25 [20–30] | 21 [17–25] |
1-30 | 45 [40–50] | 42 [37–47] | 43 [38–48] | 35 [30–40] | 52 [46–58] | 50 [45–55] | 44 [39–49] |
>30 | 25 [21–29] | 26 [21–31] | 27 [23–31] | 37 [32–42] | 24 [19–29] | 25 [20–30] | 36 [31–41] |