Skip to main content

Table 2 The Newcastle–Ottawa Scale(NOS) scores of the studies included in the meta-analysis

From: Association between abnormal body mass index and pregnancy outcomes in patients following frozen embryo transfer: a systematic review and meta-analysis

  Selection     Comparability Outcome    
Study Representativeness of the exposed cohort Selection of the non-exposed cohort Ascertainment of exposure Demonstration that outcome of interest was not present at start of study Control for important factors a Assessment of outcome Was follow-up long enough for outcomes to occur Adequacy of follow-up of cohorts Scores
Chen et al. [22] - - 6
Insogna et al. [23] 9
Jin et al. [24] - - 6
Lin et al. [25] - 8
Oliva et al. [33] - 7
Ozgur et al. [26] - 7
Prost et al. [27] 9
Qiu et al. [28] - 7
Tang et al. [29] 8
Rittenberg et al. [30] 8
Wang et al. [31] 8
Zhang et al. [32] 9
  1. a A maximum of 2 stars can be allotted in this category, one for age, the other for other controlled factors