Table 3.

Scores on the apnoea-hypopnoea index and oxygen desaturation index, by sex and age

	Total	Men	Women	p value*
Apnoea-hypopnoea index (events per h)
Total	9·9 (4·2–20·6)	14·9 (7·2–27·1)	6·9 (2·7–14·1)	<0·0001
Age ≥40 to <60 years	7·6 (2·9–15·9)	11·7 (6·1–21·1)	4·3 (1·9–9·3)	<0·0001
Age ≥60 years	14·3 (7·0–27·2)	21·1 (9·4–35·6)	10·8 (5·5–20·0)	<0·0001
p value†	<0·0001	<0·0001	<0·0001	..
3% oxygen desaturation index (events per h)
Total	9·9 (4·3–19·4)	14·4 (6·9–24·9)	6·9 (2·9–13·5)	<0·0001
Age ≥40 to <60 years	7·3 (3·2–15·0)	11·4 (5·9–20·0)	4·4 (1·9–9·3)	<0·0001
Age ≥60 years	13·8 (7·0–26·1)	19·5 (9·9–32·8)	11·0 (5·4–19·5)	<0·0001
p value†	<0·0001	<0·0001	<0·0001	..
4% oxygen desaturation index (events per h)
Total	4·0 (1·2–10·1)	6·4 (2·3–14·25)	2·4 (0·7–6·5)	<0·0001
Age ≥40 to <60 years	2·7 (0·7–6·9)	4·7 (1·6–10·6)	1·3 (0·3–3·9)	<0·0001
Age ≥60 years	6·6 (2·5–15·6)	9·9 (3·9–21·1)	4·9 (1·9–10·3)	<0·0001
p value†	<0·0001	<0·0001	<0·0001	..

Data are median scores (IQR). The apnoea-hypopnoea index is defined as the number of apnoea and hypopnoea events per h. The oxygen desaturation index is defined as the number of 3% or 4% drops in oxygen saturation per h of sleep. p values calculated by Wilcoxon’s rank-sum tests.

^*Comparison between men and women.

^†Comparison between age groups.