The bHPVv double-blind, randomized placebo-controlled trial conducted in China by Zhu et al. described no-differences in the incidence rates of death in vaccine group and in the control group [82].
One study commented on staged patellar re-surfacing for persistent patellofemoral symptoms, and described no differences between both groups.
Several studies described no differences in postoperative complications after oesophagectomy (Morgan et al, 2007; Scipione et al, 2007; Melis et al, 2011; Blom et al, 2012), whereas some reported that a higher incidence of severe complications were noted in patients with higher BMI (Healy et al, 2007; Grotenhuis et al, 2010; Hayashi et al, 2010).
The results of studies that might describe no difference in sequelae for either treatment strategy should be interpreted with caution to a common limitation being a selection bias of patients with less severe injuries to the conservative arm of the study.
Several studies describe no differences in postoperative complications after an esophagectomy in overweight or obese patients compared to patients with a BMI of <25 kg/m.
While Ratcliffe et al. describe no differences in time intervals in those with or without family history of cancer [ 36], other authors have suggested that prior experience of the disease through relatives or friends could result in putting medical consultation off [ 10, 37].
Research studies have described delayed colonic transit in the elderly, 36– 38 whereas others have described no significant difference in colonic transit between the elderly and younger patients.
Study by Miller et al. (n = 18) described no immunophenotypic difference in post-NACT ovarian carcinomas in comparison to that of native neoplasm [ 9].
Contrary to the above reports, Van Den Bosch et al. described no significant difference in the levels of VEGF-A in the spinal cord of SOD1G93A mice when compared to wild-type controls [ 203] and Murakami et al. reported a higher VEGF expression level in the spinal cord of SOD1G93A mouse [ 204].
