Table 3 Joint effect of number of chronic pain sites and insomnia symptoms on risk of anxiety and depression at follow up

No chronic pain

7653

703

1.00

1.00 (reference)

1497

219

1.60

1.57 (1.36–1.81)

230

40

1.86

1.78 (1.33–2.38)

 1–2 pain sites

3063

312

1.12

1.11 (0.98–1.26)

952

149

1.73

1.69 (1.43–1.99)

146

21

1.55

1.48 (0.99–2.21)

 3–4 pain sites

1826

223

1.35

1.31 (1.14–1.52)

834

136

1.82

1.74 (1.46–2.06)

205

42

2.24

2.15 (1.62–2.84)

 ≥5 pain sites

968

139

1.60

1.52 (1.28–1.81)

717

123

1.93

1.81 (1.51–2.17)

210

48

2.56

2.42 (1.85–3.16)