Table 2

Distribution of symptoms and of putative risk factors among cases and controls according to the occupational sector
Variable All Bakers and pastry-makers Hairdressers
Cases (N = 31) Controls (N = 196) p Cases (N = 24) Controls (N = 111) p Cases (N = 7) Controls (N = 85) p Test usedΩ
Body mass index (kg/m2) Mean [SD] 25.9 [5.9] 24.2 [3.9] 0.13 25.6 [5.8] 25.1 [4.1] 0.94 27.2 [6.3] 23.1 [3.4] 0.07 KW
Work-related rhinitis symptoms % 28 (90.3%) 77 (39.3%) <0.001 22 (91.7%) 45 (40.5%) <0.001 6 (85.7%) 32 (37.7%) 0.02 Chi2
Work-related eczema symptoms % 11 (35.5%) 23 (11.7%) 0.002 7 (29.2%) 7 (6.4%) <0.001 4 (57.1%) 16 (18.8%) 0.04 Chi2
Work-related urticaria symptoms % 7 (22.6%) 12 (6.1%) 0.007 6 (25.0%) 4 (3.6%) 0.002 1 (14.3%) 8 (9.4%) 0.53 Fisher
Personal atopy % 26 (83.9%) 78 (39.8%) <0.001 21 (87.5%) 44 (39.6%) <0.001 5 (71.4%) 34 (40.0%) 0.13 Chi2
Family atopy % 12 (38.7%) 82 (41.8%) 0.74 8 (33.3%) 37 (33.3%) 1.00 4 (57.1%) 45 (52.9%) 1.00 Chi2
Exposure duration (year)
   0 - 4.7 (Q1) % 14 (45.1%) 42 (21.4%) 11 (45.8%) 29 (26.1%) 3 (42.9%) 13 (15.3%)
   4.8 - 6.6 (Q2) % 3 (9.7%) 55 (28.1%) 0.02 2 (8.3%) 33 (29.7%) 0.11 1 (14.3%) 22 (25.9%) 0.40 Chi2
   6.7 - 8.2 (Q3) % 7 (22.6%) 49 (25.0%) 6 (25.0%) 25 (22.5%) 1 (14.3%) 24 (28.2%)
   8.3 - 13.8 (Q4) % 7 (22.6%) 50 (25.5%) 5 (20.8%) 24 (21.6%) 2 (28.6%) 26 (30.6%)
Score of exposure intensity
Among bakers/pastrymakers§ Mean [SD] - - - 5.0 [3.1] 5.5 [3.5] 0.59 - - - KW
Among hairdressers† Mean [SD] - - - - - - 6.9 [1.3] 4.5 [2.4] 0.01 KW

Ω KW = Kruskal-Wallis test – Chi2 = chi-square test – Fisher = fisher test.

§ Score max = 14.

† Score max = 8.

Rémen et al.

Rémen et al. BMC Public Health 2012 12:387   doi:10.1186/1471-2458-12-387

Open Data