Table 1 Comparison of social factors, low back pain (LBP) and sickleave obtained at baseline for responders and non-responders at three subsequent surveys (Survey 1, survey 2 and survey 3)
Variables of interest | Survey 1 | Survey 2 | Survey 3 | |||
|---|---|---|---|---|---|---|
Responders% [CI] (n = 412) | Non responders% [CI] (n = 213) | Responders% [CI] (n = 348) | Non responders% [CI] (n = 64) | Responders% [CI] (n = 293) | Non responders% [CI] (n = 119) | |
Gender | ||||||
Female | 52 [47–57] | 45 [38–52] | 54 [49–59] | 41 [29–53] | 54 [48–60] | 47 [38–56] |
Employment status | ||||||
Self employed | 7 [5–9] | - | 7 [4–10] | 8 [1–15] | 7 [4–10] | 8 [3–13] |
Assisting spouse | 0 | - | 1 [0–2] | 0 | 0 | 1 [0–3] |
Employed | 84 [80–88] | - | 86 [82–90] | 72 [61–83] | 87 [83–91] | 76 [68–84] |
Unemployed | 4 [2–6] | - | 3 [1–5] | 9 [2–16] | 3 [1–5] | 8 [3–13] |
Pensioner | 3 [1–5] | - | 2 [1–3] | 8 [1–15] | 1 [0–2] | 6 [2–10] |
Others outside labor force | 2 [1–3] | - | 2 [1–3] | 3 [0–7] | 2 [0–4] | 3 [0–6] |
Highest educational level | ||||||
Basic school | 22 [18–26] | - | 21 [17–25] | 28 [17–39] | 19 [15–23] | 30 [22–38] |
General upper-secondary education | 2 [1–3] | - | 3 [1–5] | 0 | 2 [0–4] | 3 [0–6] |
Vocational education/training | 31 [27–35] | - | 32 [27–37] | 25 [14–36] | 34 [29–39] | 24 [16–32] |
Short-cycle higher education | 20 [16–24] | - | 21 [17–25] | 17 [8–26] | 21 [16–26] | 19 [12–26] |
Medium-cycle higher education | 19 [15–23] | - | 18 [14–22] | 23 [13–33] | 19 [15–23] | 18 [11–25] |
Long-cycle higher education | 6 [4–8] | - | 5 [3–7] | 6 [0–12] | 5 [3–7] | 7 [2–12] |
LBP past year | ||||||
Yes | 69 [65–73] | - | 68 [63–73] | 77 [67–87] | 69 [64–74] | 76 [68–84] |
Number of days with LBP past year | ||||||
0 | 30 [26–34] | - | 32 [27–37] | 20 [10–30] | 32 [27–37] | 24 [16–32] |
1-30 | 45 [40–50] | - | 45 [40–50] | 47 [35–59] | 46 [40–52] | 43 [34–52] |
>30 | 25 [21–29] | - | 23 [19–27] | 33 [21–45] | 21 [19–24] | 34 [25–43] |
Sick-leave past year because of LBP | ||||||
No | 80 [76–84] | - | 84 [80–88] | 80 [70–90] | 85 [81–89] | 74 [66–82] |
Number of days with sick-leave past year | ||||||
0 | 80 [76–84] | - | 80 [76–84] | 80 [70–90] | 82 [78–86] | 74 [66–82] |
1-30 | 15 [12–18] | - | 15 [11–19] | 13 [5–21] | 13 [9–17] | 18 [11–25] |
>30 | 5 [3–7] | - | 5 [3–7] | 8 [1–15] | 4 [2–6] | 8 [3–13] |