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Table 3 Longitudinal association between purpose in life and incident poor lung function

From: Purpose in life and lung function: an individual-participant meta-analysis of six cohort studies

Sample

Model 1

Model 2

 

N

HR

95% CI

p

N

HR

95% CI

p

HRS

6480

0.89

0.86, 0.93

< 0.001

6380

0.91

0.88, 0.96

< 0.001

MIDUS

346

0.95

0.76, 1.18

0.626

325

0.95

0.74, 1.21

0.666

NHATS

3124

0.93

0.88, 0.98

0.008

3086

0.94

0.88, 0.99

0.022

ELSA

1645

0.93

0.86, 1.01

0.095

1632

0.96

0.88, 1.05

0.423

Meta-analysis

11,595

0.91

0.88, 0.94

< 0.001

11,423

0.93

0.90, 0.96

< 0.001

  1. Note. Poor lung function is < 80% of expected value based on the Nunn & Gregg formula (see Method). HR = hazard ratio. CI = confidence interval. HRS = Health and Retirement Study. MIDUS = Midlife in the United States study. WLS = Wisconsin Longitudinal Study. NHATS = National Health and Aging Trends Study. ELSA = English Longitudinal Study of Ageing. SHARE = Survey of Health, Ageing and Retirement in Europe. Model 1 controlled for age, sex, race, ethnicity, height and education. Model 2 was Model 1 with the addition of behavioral (smoking, physical activity) and clinical (body mass index, depression) factors. Proportion of predicted PEF controlled for race, ethnicity, and education. All analyses of WLS also included a control variable for sample type (respondent/sibling)