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Table 4 Relationships between psychosocial work characteristics in 2015 and onset of low back pain (LBP) in 2016 among participants without LBP in 2015 (n = 150)

From: Psychosocial work characteristics and low back pain in daycare (nursery) workers in Japan: a prospective cohort study

Psychosocial work characteristics in 2015

LBP prevalence in 2016

Odds ratios and 95% confidence intervals for the onset of LBP

Crude

Adjusted

Model 1

Model 2

High Job strain a

  Absent

28.1% (34/121)

1

1

1

  Present

37.0% (10/27)

1.51 (0.63–3.61)

1.95 (0.77–4.95)

2.36 (0.88–6.30)

Low Social support b

  Absent

24.4% (22/90)

1

1

1

  Present

37.9% (22/58)

1.89 (0.92–3.86)

2.48 (1.10–5.60)*

2.28 (0.97–5.34)

Effort-reward imbalance c

  Absent

31.1% (41/132)

1

1

1

  Present

18.2% (2/11)

0.49 (0.10–2.39)

0.69 (0.13–3.63)

0.46 (0.07–3.01)

Overcommitment d

  Absent

27.1% (29/107)

1

1

1

  Present

39.5% (15/38)

1.75 (0.81–3.82)

1.63 (0.70–3.76)

1.45 (0.60–3.50)

  1. Model 1: adjusted for age, sex, BMI, and smoking in 2015
  2. Model 2: adjusted for age, sex, BMI, smoking, regular employment, occupation, and irregular work in 2015
  3. The numbers of missing responses: a) 2, b) 2, c) 7 and d) 5
  4. *p<0.05