Table 3. Comparison of the neurological symptoms and signs between job categories in each cohort (OR and CI), and homogeneity evaluation of the comparisons across the two cohorts (X2, p-value) and the significance of the Mantel-Haenszel common odds ratio (M-H OR (95% CI).
| Signs/Symptoms | 2005 | 2009 | X2 (1df), p | M-H OR (95% CI) | ||||
|---|---|---|---|---|---|---|---|---|
| Non-applicators (n = 38) N (%) | Applicators (n = 41) N (%) | OR (95% CI) | Non-applicators (n = 20) N (%) | Applicators (n = 21) N (%) | OR (95% CI) | |||
| Headache | 9 (23.7) | 15 (36.6) | 1.86 (0.70, 4.96) | 2 (10.0) | 4 (19.0) | 2.12 (0.34, 13.1) | 0.02, 0.90 | 1.92 (0.81, 4.54) |
| Arthralgia | 9 (23.7) | 11 (26.8) | 1.18 (0.43, 3.27) | 2 (10.0) | 3 (14.3) | 1.50 (0.22, 10.1) | 0.047, 0.83 | 1.25 (0.51, 3.06) |
| Pain | 6 (15.8) | 8 (19.5) | 1.29 (0.40, 4.14) | 2 (10.0) | 2 (9.5) | 0.95 (0.12, 7.46) | 0.07, 0.79 | 1.20 (0.44, 3.30) |
| Fatigue | 3 (7.9) | 15 (36.6) | 6.73 (1.76, 25.7) | 1 (5.0) | 4 (19.0) | 4.47 (0.45, 44.0) | 0.09, 0.76 | 6.06 (1.91, 19.2)* |
| Blurred vision | 2 (5.3) | 14 (34.1) | 9.33 (1.95, 44.6) | 1 (5.0) | 3 (14.3) | 3.17 (0.30, 33.3) | 0.59, 0.44 | 6.92 (1.92, 25.0)* |
| Feeling depressed | 2 (5.3) | 13 (31.7) | 8.36 (1.74, 44.1) | 1 (5.0) | 4 (19.0) | 4.47 (0.45, 44.0) | 0.20, 0.66) | 6.92 (1.91, 25.1)* |
| Difficulty in concentration | 2 (5.3) | 12 (29.3) | 7.45 (1.54, 36.0) | 0 | 1 (4.8) | 0.13, 0.72 | 8.11 (1.69, 39.0)* | |
| Dizziness | 2 (5.3) | 12 (29.3) | 7.45 (1.54, 36.0) | 0 | 0 | |||
| Difficulty in understanding a | 2 (5.3) | 11 (26.8) | 6.6 (1.36, 32.1) | 1 (5.0) | 2 (9.5) | 2.00 (0.17, 24.0) | 0.67, 0.41 | 4.86 (1.31, 18.0)* |
| Troubles in remembering b | 1 (2.6) | 12 (29.3) | 15.3 (1.88, 125) | 1 (5.0) | 4 (19.0) | 4.47 (0.45, 44.0) | 0.65, 0.42 | 9.56 (2.11, 43.4)* |
| Feeling irritable | 1 (2.6) | 11 (26.8) | 13.6 (1.66, 111) | 1 (5.0) | 4 (19.0) | 4.47 (0.45, 44.0) | 0.52, 0.47 | 8.82 (1.93, 40.3)* |
| Numbness | 1 (2.6) | 9 (22.0) | 10.4 (1.25, 86.6) | 0 | 3 (14.3) | 0.31, 0.58 | 14.0 (1.73, 114)* | |
| Superficial sensation abnormality | 2 (5.3) | 12 (29.3) | 7.45 (1.54, 36.0) | 0 | 3 (14.3) | 0.43, 0.51 | 9.44 (2.00, 44.6)* | |
| Knee reflex abnormality | 2 (5.3) | 10 (24.4) | 5.81 (1.18, 28.5) | 0 | 1 (4.8) | 0.17, 0.68 | 6.43 (1.32, 31.3)* | |
| Tremors | 2 (5.3) | 8 (19.5) | 4.36 (0.86, 22.0) | 0 | 1 (4.8) | 0.22, 0.64 | 4.95 (1.00, 24.5)* | |
| Incoordination | 1 (2.6) | 10 (24.4) | 11.9 (1.45, 98.5) | 2 (10.0) | 4 (19.0) | 2.12 (0.43, 13.1) | 1.63, 0.20 | 5.27 (1.43, 19.4)* |
| Ankle reflex abnormality | 1 (2.6) | 6 (14.6) | 6.34 (0.73, 55.4) | 0 | 1 (4.8) | 0.15, 0.70 | 7.44 (0.87, 63.6) | |
| Muscle power abnormality | 1 (2.6) | 5 (12.2) | 5.14 (0.57, 46.2) | 0 | 1 (4.8) | 0.19, 0.66 | 6.21 (0.71, 54.0) | |
| Deep sensation abnormality | 0 | 1 (2.4) | 0 | 0 | ||||
a, Difficulty in understanding meanings of newspaper and books
b, Troubles in remembering things observed by relatives