Table 1.

Description of the sample

	MEN		WOMEN
	N=2673		N=3213
	n	%	n	%	χ2	df	p-value
Center
Bordeaux	460	17.21	454	14.13	11.06	2	0.004
Dijon	1427	53.39	1806	56.21
Montpellier	786	29.41	953	29.66
Age (years)
65–69	771	28.84	1012	31.50	7.68	3	0.053
70–74	948	35.47	1051	32.71
75–79	644	24.09	800	24.90
80+	310	11.60	350	10.89
Widowed or divorced	368	13.77	1226	38.16	439.55	1	<0.0001
Education
High	762	28.51	467	14.53	174.49	2	<0.0001
Medium	1359	50.84	2006	62.43
Low	552	20.65	740	23.03
BMI (kg/m2)
<25	1008	37.71	1750	54.47	205.51	2	<0.0001
25–29	1340	50.13	1035	32.21
>30	325	12.16	428	13.32
Alcohol intake
0–12 g/day	1058	39.58	2588	80.55	1138.61	2	<0.0001
13–36 g/day	1114	41.68	572	17.80
>36 g/day	501	18.74	53	1.65
Coffee drink > 2 cups/day	750	28.06	715	22.25	26.30	1	<0.0001
Mediterranean diet	1584	59.26	1649	51.32	37.12	1	<0.0001
Menopause
Normal		.	2586	80.49
Surgical		.	262	8.15
Medical treatment		.	365	11.36
Hormone Replacement Therapy (HRT)
Never		.	2162	67.29
Past		.	541	16.84
Current		.	510	15.87
CES-D ≥ 16	368	13.77	903	28.10	177.15	1	<0.0001
Chronic diseases
0	455	17.02	593	18.46	8.25	2	0.016
1	874	32.70	1125	35.01
≥2	1344	50.28	1495	46.53
Sleep medication	370	13.84	865	26.92	150.56	1	<0.0001
Loud snoring	474	17.73	278	8.65	107.96	1	<0.0001
Sleepiness	581	21.74	407	12.67	85.91	1	<0.0001
Nightmares	95	3.55	197	6.13	20.56	1	<0.0001
Number of symptoms
0	791	29.59	860	26.77	190.49	3	<0.0001
1	1006	37.64	838	26.08
2	582	21.77	774	24.09
3	294	11.00	741	23.06
Composite symptom index*:
None	791	29.59	860	26.77	340.71	7	<0.0001
DIS only	53	1.98	150	4.67
DMS only	832	31.13	578	17.99
EMA only	121	4.53	110	3.42
DIS + DMS	195	7.30	379	11.80
DIS + EMA	28	1.05	93	2.89
EMA + DMS	359	13.43	302	9.40
DIS + EMA + DMA	294	11.00	741	23.06

^*corresponding to either isolated or associated symptoms