title: Women's patterns of activity over 6 months after coronary artery bypass surgery.
abstract: OBJECTIVE
  To examine the relationships between objectively measured activity patterns over 6 months after coronary artery bypass surgery (CABS) and their relationship to self-reported functional recovery at 6 weeks and 6 months after CABS.
  
  
  METHODS
  Time series, descriptive-correlational, convenience sample.
  
  
  METHODS
  Hospital and home environment.
  
  
  METHODS
  Thirteen women who had undergone CABS. The mean age was 62 years (SD 10.76, range, 43 to 78). The mean preoperative New York Heart Association Functional Classification was 2.08 (SD 1.26, range, 1 to 4).
  
  
  METHODS
  Wrist-worn accelerometers and the Sickness Impact Profile (SIP).
  
  
  METHODS
  Women wore the accelerometers for 4 week-long intervals: the first postoperative week (T1), the first week after hospitalization (T2), the sixth postoperative week (T3), and the first week of the sixth postoperative month (T4). The SIP was administered at the end of each week of data collection.
  
  
  RESULTS
  Circadian rhythms and linear trends in activity were examined with spectral, cosinor, and least squares regression analyses. Repeated measures ANOVA over T1 through T4 demonstrated statistically significant increases in the strength of the circadian rhythms and means levels of activity over T1 to T4. There were no statistically significant relationships between activity parameters at T1, T3, or T4 and SIP scores at T3 or T4.
  
  
  CONCLUSIONS
  This study is the first to report changes in circadian rhythms and levels of objectively measured activity over 6 months after CABS. The findings suggest that women's levels of activity and the strength of the circadian rhythm of activity increase between the early postoperative period and the sixth postoperative month. More research is needed to further explore the trajectory of activity patterns after CABS, their relationships to recovery and to determine the need for and effectiveness of interventions designed to promote recovery through activity patterning.
authors.affiliation: Rutgers University, Newark, NJ 07102, USA.
authors.forename: N S
authors.initials: NS
authors.lastname: Redeker
authors.forename: D J
authors.initials: DJ
authors.lastname: Mason
authors.forename: E
authors.initials: E
authors.lastname: Wykpisz
authors.forename: B
authors.initials: B
authors.lastname: Glica
mesh_terms: D000203:Activities of Daily Living; D000204:Activity Cycles; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D002940:Circadian Rhythm; D001026:Coronary Artery Bypass / Q000009:adverse effects / Q000534:rehabilitation*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D018670:Monitoring, Ambulatory; D009043:Motor Activity; D011184:Postoperative Period