Table 2.

Relation of shift work patterns with occurrence of Restless Legs Syndrome (RLS)

Group	Suffering from RLS		Crude OR [95% CI]	Adjusted* OR [95% CI]
	No	Yes
Day workers (Group A), n (%)	238 (91.5)	22 (8.5)	1.0 Reference	1.0 Reference
Rotational shift workers, n (%)
- Group B	220 (85.3)	38 (14.7)	1.87 [1.07-3.26]§	1.82 [1.03-3.21]§
- Group C	212 (84.8)	38 (15.2)	1.94 [1.11-3.38]§	1.98 [1.12-3.51]§
- Groups B and C	432 (85)	76 (15)	1.9 [1.15-3.14]§	1.89 [1.13-3.16]§

Notes: Group B: workers who follow a work schedule which consists of weekly rotation between morning and afternoon shifts for five weeks in a row, followed by one week of night shifts on week six; Group C: workers who follow a work schedule which consists of weekly rotation between morning, afternoon and night shifts; n = number; OR = odds ratio; CI = confidence interval

* This analysis was adjusted by age and drug consumption.

^§ P-value < 0.05