Table 1. General Demographics and Sleep Characteristics in the two groups.

Characteristic	RAO group n = 152	RA+ group n = 173	Cluster-adjusted difference between groups, Mean or Odds Ratio (95% CI value)	p value (between group comparisons)
Mean Age ± SD	55.5±16.7	54.4 ±15.1	1.21(−5.4 −7.8)	0.71
% Male	46.7	47.9	0.05	0.82
Mean BMI±SD	29.7±5.4	29.9±7.0	0.06(−2.8 −2.9)	0.96
Sleepiness (ESS) % ESS>10	18.1	28.0	4.4	0.05
Mean ESS±SD ESS score range 0–24	5.6±4.2	7.0±4.8	−1.4(−2.8 −0.09)	0.06
Insomnia (ISI) % ISI≥15	27.3	40.5	6.2	0.01
Mean ISI Score ± SD ISI Score range 0–28	10.7±6.9	12.1±6.9	−2.0 (−5.3−1.2)	0.21
Sleep apnea risk (MAPI) % MAPI ≥0.5	37.0	44.1	1.7	0.20
Mean MAPI ± SD MAPI probability range 0–1	0.41±0.3	0.43±0.3	−0.02(−0.10−0.06)	0.65
At risk of RLS (RLS minimum question set) % responding ‘Yes’ to questions 1–3	42.6	46.6	0.45	0.54
Mean RLS Score ± SD, RLS Score Range 0–3	1.5±1.4	1.6±1.4	−0.30(−0.97 −0.37)	0.36
% Sleeping alone	37.5	45.1	1.91	0.18
% Undertaking shift work	11.3	9.3	1.5	0.46
% Consuming caffeine after 1500 hours	67.8	64.0	0.49	0.54
% Consuming alcohol after 2000 hours	50	54.2	0.46	0.53
Self reported average hours of sleep	6.46±1.7	6.36±1.7	0.19(−0.40–0.80)	0.51