Table 2.

Results of the univariate and multivariate analysis

Variable	Univariate analysis, n (%)	Multivariate analysis
		OR	95% CI	p value
Model 1. Outcome: elevated BP/HTN		log-likelihood = −67.877, X2 = 21.19, p value = 0.0007, number of obs. = 527
BMI
Low/normal weight	5 (1.6)	1.00a
Overweight or obese	15 (6.3)	4.26	1.35–13.42	0.013
	X2 = 8.99, 1 df, p = 0.003
Steroid therapy
No	6 (2.1)	1.00a
Yes	13 (5.2)	2.26	0.81–6.30	0.117
	X2 = 3.96, 1 df, p = 0.046
Daily servings of fruit and vegetables
Inadequate	14 (4.4)	1.00a
Adequate	5 (2.2)	0.51	0.17–1.52	0.231
	X2 = 1.84, 1 df, p = 0.175
Having had breakfast on the day of examination
No	6 (10)	1.00a
Yes	13 (2.7)	0.30	0.10–0.86	0.026
	X2 = 8.32, 1 df, p = 0.004
Consumption of snacks
Inadequate	15 (3)	1.00a
Adequate	4 (9.5)	0.36	0.10–1.25	0.109
Consumption of soft drinks/fruit juices
Adequate	3 (4.1)
Inadequate	16 (3.4)
	X2 = 0.08, 1df, p = 0.771	Backward elimination
Physical activity
Inadequate	3 (2.33)
Moderate	16 (4.5)
Adequate	− (–)
	X2 = 3.38, 2df, p = 0.184	Backward elimination
Model 2. Outcome: high IOP		log-likelihood = 13.231, X2 = 0.01, p value <0.0001, number of obs. = 534
Elevated BP/HTN
No	61 (11.5)	1.00a
Yes	8 (42.1)	5.36	1.95–14.73	0.001
	X2 = 15.72, 1 df, p < 0.001
Time spent on homework
≤2 h/day	33 (10.8)	1.00a
>2 h/day	32 (14.1)	1.32	0.77–2.24	0.301
	X2 = 1.36, 1 df, p = 0.242
Steroid therapy
No	38 (13.1)	1.00a
Yes	31 (12.6)	0.81	0.57–1.13	0.221
	X2 = 0.03, 1 df, p = 0.861
Refractive errors
None	28 (11.6)	1.00a
Hyperopia	31 (14.4)	1.28	0.75–2.18	0.359
Myopia	4 (14.8)	Backward elimination
Astigmatism	1 (7.1)	Backward elimination
More than one refractive error	5 (9.6)	Backward elimination
	X2 = 1.76, 4 df, p = 0.780

Bold p values are statistically significant.

^aReference category.