Table 2 Associations of regular status and the teammate quantity index with the prevalence of pain

 Overall, case/n (%)

80/189 (42.3)

48/121 (39.7)

47/116 (40.5)

93/179 (52.0)

 Crude PR (95% CI)

1 (reference)

0.94 (0.66–1.35)

0.95 (0.67–1.33)

1.22 (0.91–1.64)

0.06

 Adjusted PR (95% CI)^b

1 (reference)

0.94 (0.64–1.37)

0.98 (0.69–1.41)

1.24 (0.89–1.74)

0.13

 Upper limb, case/n (%)

23/189 (12.2)

15/126 (11.9)

16/117 (13.7)

35/179 (19.6)

 Crude PR (95% CI)

1 (reference)

0.97 (0.51–1.83)

1.10 (0.59–2.05)

1.59 (0.96–2.64)

0.32

 Adjusted PR (95% CI)^b

1 (reference)

0.69 (0.34–1.39)

1.11 (0.57–2.16)

1.04 (0.57–1.89)

0.41

 Lower back, case/n (%)

16/192 (8.3)

8/123 (6.5)

13/116 (11.2)

39/183 (21.3)

 Crude PR (95% CI)

1 (reference)

0.90 (0.39–2.08)

1.28 (0.63–2.61)

2.45 (1.38–4.36)

0.11

 Adjusted PR (95% CI)^b

1 (reference)

0.92 (0.38–2.22)

1.10 (0.52–2.33)

2.08 (1.07–4.02)

0.19

 Lower limb, case/n (%)

53/189 (28.0)

36/123 (29.3)

33/115 (28.7)

55/179 (30.7)

 Crude PR (95% CI)

1 (reference)

1.04 (0.69–1.56)

1.00 (0.66–1.51)

1.13 (0.78–1.62)

0.13

 Adjusted PR (95% CI)^b

1 (reference)

1.06 (0.69–1.62)

1.03 (0.67–1.58)

1.19 (0.79–1.80)

0.27