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Table 1 Characteristics of included studies

From: Physical activity to improve cognition in older adults: can physical activity programs enriched with cognitive challenges enhance the effects? A systematic review and meta-analysis

Authors

Year

Country

Mode of PA + CA combination

Type of sim

Comparison groups

Cognitive status

Intervention length

Session duration

Session frequency

EPHPP study quality

Study design

Fabre et al.

2002

France

seq

n/a

control, PA, CA

healthy

short

long

high

weak

RCT

Oswald et al.

2006

Germany

seq

n/a

control, CAa

healthy

long

long

low

weak

non-RCT

Taylor-Piliae et al.

2010

US

sim

tai chi

control, PA

healthy

long

n/a

high

weak

RCT

Kim et al.

2011

South Korea

sim

dance

control

healthy

long

medium

medium

strong

non-RCT

Legault et al.

2011

US

seq

n/a

control, PA, CA

healthy

medium

n/a

n/a

weak

RCT

Hiyamizu et al.

2012

Japan

sim

dual-task

PA

healthy

medium

medium

medium

strong

RCT

Jansen et al.

2012

Germany

sim

karate

control, PA, CA

healthy

medium

medium

n/a

moderate

non-RCT

Maillot et al.

2012

France

sim

exergame

control

healthy

medium

medium

medium

moderate

RCT

Lam et al.

2012

Hong Kong

sim

tai chi

control

impaired

long

short

high

strong

cRCT

Barnes et al.

2013

US

seq

n/a

PAb

impaired

medium

medium

high

moderate

RCT

Kattenstroth et al.

2013

Germany

sim

dance

control

healthy

long

medium

low

weak

RCT

Schoene et al.

2013

Australia

sim

exergame

control

healthy

short

short

medium

moderate

RCT

Suzuki et al.

2013

Japan

sim

dual-task

control

impaired

long

long

medium

strong

RCT

Theill et al.

2013

Switzerland

sim

dual-task

control, CA

healthy

short

short

medium

weak

non-RCT

Teixeira et al.

2013

Brazil

sim

dual-task

control

healthy

medium

short

high

moderate

non-RCT

Fiatarone et al.

2014

Australia

seq

n/a

control, PA, CA

impaired

long

long

medium

moderate

RCT

Hughes et al.

2014

US

sim

exergame

control

impaired

long

long

low

strong

RCT

Shah et al.

2014

Australia

seq

n/a

control, PA, CA

healthy

medium

medium

high

moderate

non-RCT

van het Reve et al.

2014

Switzerland+Germany

seq

n/a

PA

healthy

medium

short

high

weak

RCT

Li et al.

2014

US

sim

tai ji quan

control

impaired

medium

medium

medium

moderate

non-RCT

Hackney et al.

2015

US

sim

dance

control

healthy

medium

long

n/a

strong

non-RCT

Eggenberger et al.

2015

Switzerland

sim

exergame and dual taskc

PA

healthy

long

medium

medium

weak

RCT

Yokoyama et al.

2015

Japan

sim

dual-task

PA

healthy

medium

medium

high

moderate

RCT

Sato et al.

2015

Japan

sim

dual-task

PA

healthy

short

medium

low

moderate

RCT

Nishiguchi et al.

2015

Japan

sim + seq

dual-task

control

healthy

medium

long

n/a

strong

RCT

Styliadis et al.

2015

Greece

sim + seq

exergame

control, CAa,d

impaired

short

medium

high

weak

non-RCT

Kitazawa et al.

2015

Japan

sim

dual-task

control

healthy

short

medium

low

moderate

RCT

Leon et al.

2015

Spain

sim

dual-task

control, PA

healthy

medium

medium

medium

moderate

RCT

Ansai et al.

2016

Brazil

sim

dual-task

PA

healthy

medium

medium

high

weak

cRCT

Desjardins-Crépeau et al.

2016

Canada

seq

n/a

control, PA, CA

healthy

medium

medium

high

moderate

RCT

Eggenberger et al.

2016

Switzerland

sim

exergame

control

healthy

short

short

high

weak

RCT

Falbo et al.

2016

Italy

sim

dual-task

PA

healthy

medium

medium

medium

strong

RCT

Hagovska et al.

2016

Slovac Republic

sim + seq

dual-task

PA

impaired

short

short

high

strong

RCT

Lu et al.

2016

Hong Kong

sim

tai chi

control

healthy

medium

long

high

moderate

RCT

Witte et al.

2016

Germany

sim

karate

control, PA

healthy

medium

medium

medium

moderate

RCT

Merom et al.

2016

Australia

sim

dance

PA

healthy

long

medium

medium

moderate

RCT

Schättin et al.

2016

Switzerland

sim

exergame

control

healthy

short

short

high

moderate

RCT

Müller et al.

2017

Germany

sim

dance

PA

healthy

long

long

medium

weak

RCT

Sungkarat et al.

2017

Thailand

sim

tai chi

control

impaired

medium

medium

high

strong

RCT

Damirchi et al.

2018

Iran

seq

n/a

control, PA, CA

impaired

short

medium

high

moderate

RCT

Siu et al.

2018

Hong Kong

sim

tai chi

control

impaired

medium

medium

medium

weak

cRCT

  1. seq Sequential, sim Simultaneous, PA Only physical activity program, CA Only cognitive activity program, intervention length: short (< 12 weeks), medium (12–23 weeks), or long (≥ 24 weeks); session duration: short (≤ 45 min), medium (> 45 to ≤60 min) or long (> 60 min); session frequency: low (1 session/week), medium (2 sessions/week) or high (≥ 3 sessions/week). RCT Randomized controlled trial, non-RCT Non-randomized controlled trial, cRCT Cluster randomized controlled trial
  2. athe comparison with the PA group was removed from present meta-analysis because this program also included forms of cognitive training which was a priori defined as a potential bias in our protocol
  3. bthe CA and control group were removed from present meta-analysis because these programs also included strength training which was a priori defined as a potential bias in our protocol
  4. ceffect sizes were combined for both simultaneous programs following Higgings and Green, 2011 (cf. study protocol)
  5. dthe active (not passive) control group was included (cf. study protocol)
  6. n/a = type of simultaneous combination could not be defined given the sequential design, or moderator variable could not be clearly defined and hence, was removed from moderator analysis