There is an opportunity for future research to explore the role that individual (eg, the chronic nature of mental disorders), occupational (eg, job characteristics) and environmental (eg, workplace stigma) factors play in the differences in the recurrence of physical versus mental disorder-related sickness absences.
Muzii et al [ 48] found no significantly difference in the recurrence rates of pain at follow-up between patients receiving oral contraceptives pills (9.1%) and untreated patients (17.1%).
There is no significant difference in the recurrence rates, regardless of the age or sex of the patient, size of the lesion, amount of calcification or vascular invasion seen on histological examination, duration of follow-up, or method of treatment.
The difference in the recurrence intervals is consistent with that of the historical sequence, except for the short recurrences of the Showa events.
When we repeated this comparison after adjusting for women who had concomitant exposure to hormonal therapy, the lack of difference in risk of recurrence of venous thromboembolism between men and women persisted (hazard ratio 1.2, 0.6 to 2.3).
A recent meta-analysis compared the results of open and arthroscopic Bankart repair, and found no difference in terms of recurrence of instability (6.7 % and 6%%, respectively) and rate of reoperation (6.6 and 4.7 %) [5].
There was no evidence of a difference in rates of recurrence of healed ulcers (17/31 with ultrasound v 14/31 with standard care, P=0.68 for Fisher's exact test).
From this viewpoint, it is very important to investigate any differences in the recurrence interval and magnitude of the Bungo and northern Miyazaki slow slips before and after the Tohoku earthquake.
The patients were followed for 1 year, and we found no significant differences in the recurrence rate and life quality of patients after discharge.
