TABLE 2

Summary of results of cluster analyses according to clinical variables of interest in obstructive sleep apnoea (OSA) patients

VariableFirst author [reference]Results
Insomnia symptomsYe [87]
Saaresranta [89]
Gagnadoux [93]		Disturbed sleep cluster
EDS+insomnia+ phenotype; EDS-insomnia+ phenotype
Female OSA (cluster 1), comorbid OSA (cluster 6)
EDSYe [87]
Vavougios [88]
Saaresranta [89]
Bailly [90]

Mihaicuta [92]
Gagnadoux [93]
Lacedonia [91]		EDS cluster
Clusters 4 and 5
EDS+insomnia+ phenotype; EDS-insomnia+ phenotype
Young symptomatic OSA (cluster 1); drowsy obese (cluster 5), multimorbid OSA (cluster 6)
Clusters 1–4
Clusters 2 and 3
Cluster 1
Female OSAYe [87]

Vavougios [88]
Saaresranta [89]
Bailly [90]
Lacedonia [91]
Mihaicuta [92]
Gagnadoux [93]		Disturbed sleep cluster (lowest percentage of male patients)
Not identified
Not identified
Not identified
Not identified
Clusters 2 and 3
Cluster 1
Comorbid OSA, few OSA symptomsYe [87]
Vavougios [88]
Saaresranta [89]
Bailly [90]
Lacedonia [91]
Mihaicuta [92]
Gagnadoux [93]		Minimally symptomatic cluster
Cluster 2
No EDS/no insomnia phenotype
Cluster 3
Cluster 3
Clusters 4 and 5
Cluster 5
Young, severe OSABailly [94]

Lacedonia [91]
Mihaicuta [92]		Young symptomatic OSA (cluster 1) and young snorer without comorbidities (cluster 4)
Cluster 1
Cluster 7
Elderly OSA patientsBailly [90]

Lacedonia [91]
Mihaicuta [92]
Gagnadoux [93]		Older obese (cluster 2) and the multidiseased old obese (cluster 3)
Cluster 3
Cluster 4
Clusters 4 and 5

EDS: excessive daytime sleepiness.