Table 3 Distribution of persistent complaints in different parts of the body of sewers , prevalence proportion ratio (PPR) and 95% confidence interval (CI), compared with joint group (n = 300)
From: The effects of a medical hypnotherapy on clothing industry employees suffering from chronic pain
|  | Sewers* (n = 300) | Reference groups (length of service, years) | ||||||
|---|---|---|---|---|---|---|---|---|
I (0–7) (n = 150) | II (8–15) (n = 90) | III (> 15) (n = 60) | ||||||
Number | % | Number | % | Number | % | Number | % | |
PPR | (95% CI) | PPR | (95% CI) | PPR | (95% CI) | |||
Neck | 107 | 35.7 | 24 | 16.0 | 72 | 80.0 | 11 | 18.3 |
0.45 | (0.38-0.52) | 2.24 | (1.78-2.70) | 0.51 | (0.40-0.61) | |||
Shoulder | 130 | 43.3 | 46 | 30.6 | 67 | 74.4 | 17 | 28.3 |
0.71 | (0.59-0.82) | 1.72 | (1.36-2.07) | 0.65 | (0.51-0.78) | |||
Elbow | 28 | 9.3 | 4 | 2.6 | 14 | 15.5 | 10 | 16.6 |
0.28 | (0.23-0.32) | 1.66 | (1.31-2.00) | 1.78 | (1.41-2.15) | |||
Wrist/hands | 65 | 21.6 | 11 | 7.3 | 39 | 43.3 | 15 | 25.0 |
0.34 | (0.28-0.39) | 1.99 | (1.57-2.40) | 2.98 | (2.36-3.59) | |||
Upper back | 35 | 11.7 | 0 | 0 | 27 | 30.0 | 8 | 13.3 |
0 | Â | 2.57 | (2.04-3.10) | 2.14 | (1.70-2.58) | |||
Low back | 17 | 5.7 | 1 | 0.6 | 10 | 11.1 | 6 | 10.0 |
0.12 | (0.10-0.14) | 1.95 | (1.54-2.35) | 2.35 | (1.86-2.83) | |||
Hip/Thigh | 10 | 3.3 | 0 | 0 | 3 | 3.3 | 7 | 11.6 |
0 | Â | 1.00 | (0.79-1.20) | 3.00 | (2.38-3.62) | |||
Knee | 5 | 1.6 | 0 | 0 | 2 | 2.2 | 3 | 5.0 |
0 | Â | 1.33 | (1.05-1.60) | 3.00 | (2.38-3.62) | |||
Ankle/Shank/Feet | 7 | 2.3 | 2 | 1.3 | 2 | 2.2 | 3 | 5.0 |
0.57 | (0.48-0.66) | 0.95 | (0.75-1.14) | 2.14 | (1.70-2.58) | |||