Table 6 Factors related to reduced respiratory function by age class.

From: Characteristics of factors for decreased lung function in elderly patients with type 2 diabetes

Indicators of respiratory function

Factors relate to reduced respiratory function

Non-elderly group

Elderly group

COPD

—

Male sex

Low BMI

Insulin therapy

High CPR

FEV1/FVC ratio

High pack years

Low BMI

Insulin therapy

High CPR

FEV1% predicted

Age

Female sex

High BMI

Female sex

Insulin therapy

High CPR

High pack years

  1. CPR: C-peptide immunoreactivity, FEV1: forced expiratory volume in one second, FVC: forced vital capacity, FEV1% predicted: percent predicted forced expiratory volume in one second, Pack-years = (number of cigarettes smoked per day/20) × number of years smoked.
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