PMID- 22943071
OWN - NLM
STAT- MEDLINE
DCOM- 20130715
LR  - 20211021
IS  - 1471-2318 (Electronic)
IS  - 1471-2318 (Linking)
VI  - 12
DP  - 2012 Sep 3
TI  - Focussing both eyes on health outcomes: revisiting cataract surgery.
PG  - 50
LID - 10.1186/1471-2318-12-50 [doi]
AB  - BACKGROUND: The appropriateness of cataract surgery procedures has been 
      questioned, the suggestion being that the surgery is sometimes undertaken too 
      early in the disease progression. Our three study questions were: What is the 
      level of visual impairment in patients scheduled for cataract surgery? What is 
      the improvement following surgery? Given the thresholds for a minimal detectable 
      change (MDC) and a minimal clinically important difference (MCID), do gains in 
      visual function reach the MDC and MCID thresholds? METHODS: The sample included a 
      prospective cohort of cataract surgery patients from four Fraser Health Authority 
      ophthalmologists. Visual function (VF-14) was assessed pre-operatively and at 
      seven weeks post-operatively. Two groups from this cohort were included in this 
      analysis: 'all first eyes' (cataract extraction on first eye) and 'both eyes' 
      (cataract removed from both eyes). Descriptive statistics, change scores for 
      VF-14 for each eye group and proportion of patients who reach the MDC and MCID 
      are reported. RESULTS: One hundred and forty-two patients are included in the 
      'all first eyes' analyses and 55 in the 'both eyes' analyses. The mean 
      pre-operative VF-14 score for the 'all first eyes' group was 86.7 (on a 0-100 
      scale where 100 is full visual function). The mean change in VF-14 for the 'both 
      eyes' group was 7.5. Twenty-three percent of patients achieved improvements in 
      visual function beyond the MCID threshold and 35% saw improvement beyond the MDC. 
      CONCLUSIONS: Neither threshold level for MDC or MCID for the VF-14 scale was 
      achieved for a majority of patients. A plausible explanation for this is the very 
      high levels of pre-operative visual functioning.
FAU - Davis, Jennifer C
AU  - Davis JC
AD  - Centre for Clinical Epidemiology & Evaluation, Vancouver Coastal Health Research 
      Institute, Vancouver, Canada. Jennifer.davis@ubc.ca
FAU - McNeill, Heather
AU  - McNeill H
FAU - Wasdell, Michael
AU  - Wasdell M
FAU - Chunick, Susan
AU  - Chunick S
FAU - Bryan, Stirling
AU  - Bryan S
LA  - eng
GR  - Canadian Institutes of Health Research/Canada
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20120903
PL  - England
TA  - BMC Geriatr
JT  - BMC geriatrics
JID - 100968548
SB  - IM
MH  - Aged
MH  - Aged, 80 and over
MH  - Cataract/*diagnosis/*epidemiology
MH  - Cataract Extraction/*methods/*trends
MH  - Cohort Studies
MH  - Female
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Prospective Studies
MH  - Treatment Outcome
PMC - PMC3497611
EDAT- 2012/09/05 06:00
MHDA- 2013/07/17 06:00
PMCR- 2012/09/03
CRDT- 2012/09/05 06:00
PHST- 2012/03/02 00:00 [received]
PHST- 2012/08/27 00:00 [accepted]
PHST- 2012/09/05 06:00 [entrez]
PHST- 2012/09/05 06:00 [pubmed]
PHST- 2013/07/17 06:00 [medline]
PHST- 2012/09/03 00:00 [pmc-release]
AID - 1471-2318-12-50 [pii]
AID - 10.1186/1471-2318-12-50 [doi]
PST - epublish
SO  - BMC Geriatr. 2012 Sep 3;12:50. doi: 10.1186/1471-2318-12-50.