Factors associated with consumption of diabetic diet among type 2 diabetic subjects from Ahmedabad, Western India.
This cross-sectional study assessed the current situation of and
factors associated with consumption of diabetic diet among 399 type 2
diabetes mellitus (T2DM) subjects from Ahmedabad, Western India. The
study was performed with diagnosed (at least one year old) diabetic
subjects who attended the Department of Diabetology, All India Institute
of Diabetes and Research and Yash Diabetes Specialties Centre (Swasthya
Hospital), Ahmedabad during July 2010-November 2010. The subjects
completed an interviewer-administered questionnaire. The questionnaire
included variables, such as sociodemographic factors, family history of
diabetes, behavioural profile, risk profile (glycaemic status,
hypertension, and obesity), and diet-related history (consumption of
diabetic diet, consumption of low fat/skimmed milk, method of cooking,
and sources for diet advice). Blood pressure, body mass index,
glycosylated haemoglobin (HbA1c) level, and fasting lipid profile were
measured. All analyses including multivariate logistic regression were
conducted using SPSS, version 11.5. In total, 399 T2DM subjects (65%
male, 35% female) with mean age of 53.16 [+ or -]7.95 years were
studied. Although 73% of T2DM subjects were consuming diabetic diet, the
good glycaemic control (HbA1c level <7%) was achieved only in 35% of
the subjects. The majority (75%) of the subjects had a positive family
history of diabetes, and 52% were obese. In 77%, the main source of
dietary advice was doctor. In 36%, the main methods of cooking were:
boiling and roasting. The final multivariate model showed that visit to
dietician, level of education, intake of low fat, and family history of
diabetes were independent predictors for diabetic diet consumption among
T2DM subjects. However, longitudinal and cohort studies are required to
establish the association between consumption of diabetic diet and
Key words: Cross-sectional study; Diet; Glycaemic control; Glycosylated haemoglobin; Obesity; Type 2 diabetes mellitus; India
|Article Type:||Clinical report|
Glucose tolerance tests
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Diabetes (Health aspects)
Patel, Ina M.
Patel, Yash M.
Rathi, Suresh K.
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Type 2 diabetes mellitus (T2DM) is a chronic disease associated with high morbidity and mortality worldwide (1), and India is no exception (2, 3). Currently, India is facing a three-fold rise in the prevalence of diabetes in urban as well as in rural area (4). Subjects with T2DM are at high risk of developing micro-vascular and macro-vascular complications; hence, the need for preventive action is widely acknowledged (5). The fundamentals of diabetes control largely depend upon drug therapy and lifestyle measures (increased physical activity and restriction of energy intake/diabetic diet) (6). Improved glycaemic control may reduce the development and progression of diabetic complications to some extent (7). Wealth of information is available on improving glycaemic control and decrease glycosylated haemoglobin (HbA1c) up to 2% through diet control (8-10). Coupled with this, appropriate dietary practices play a vital role in treating diabetes mellitus and, to some extent, prevent the complications of diabetes by improving risk factor profile. Strong body of evidence suggests that role of specific dietary factors remain uncertain; however, obesity and high intake of fat are associated with increased risk of diabetes (11-14).
Despite the importance of diet in the management of T2DM, diabetic subjects are often unaware of the importance in ensuring glycaemic control (15). On the other hand, lack of dietary compliance is a major limiting factor in achieving glycaemic control in T2DM. Studies revealed that generally patients fail to adhere to dietary recommendations (16, 17). Hence, the present study aimed at providing the profile of the factors associated with consumption of diabetic diet among T2DM subjects from western India as an impetus for further exploration of the sociocultural and subject-related factors affecting the outcomes of T2DM care that, in turn, will lead to redefine the diabetes control and prevention strategies in this region.
MATERIALS AND METHODS
The study population comprised diabetic subjects. We required them to be at least 40 years of age, have been diagnosed with T2DM for at least one year before enrollment for the study and, above all, it was a prerequisite for subjects to attend the Department of Diabetology, All India Institute of Diabetes and Research and Yash Diabetes Specialities Centre (Swasthya Hospital) during the study period.
Sample-size and sampling method
A sample-size of 405 was obtained by using parameter estimation method with 5% precision around the point estimate (an expected diabetic diet consumption level of 50%) with 95% confidence level. The calculated minimum sample-size was inflated by 5% to account for anticipated non-response from subjects.
On an average, there are at least 40 known diabetes cases reporting to OPD, and the monthly load of known diabetics will be around 900-1,000. Hence, during the study period of five months, the cases will be around 4,500-5,000. The study subjects were selected through systematic random sampling strategy for 4,000 study subjects (on conservative side) who reported to the OPD. Selection of the first case was done from within the first 10 subjects (in our case, it was number 6), followed by adding 10 to the number till the required sample-size of 405 was achieved.
Procedure for data collection
After recruitment of the subjects based on selection criteria and obtaining informed consent, the details of the study methodology were explained to them; a detailed history, including data on age, sex, education, occupation, smoking status, alcohol consumption, diabetic diet, method of cooking, and source of advice regarding diet, were recorded on a close-ended proforma. Diabetic diet was defined as a dietary adjustment for patients with diabetes mellitus intended to decrease the need of insulin or oral hypoglycaemic agents to avoid wide fluctuations in plasma glucose levels and to control weight by adjusting caloric and carbohydrate intake. Diabetic diet usually contains low-glycaemic index food, with similar amount of protein, complex carbohydrates, fibres, and unsaturated fatty acids as in food for general public. Diabetic diet was evaluated by dietary recall of the last 3 days, including timings, quantity of each meal and snacks, frequency of extra meal and food consumed from outside home, and the calculated average calorie consumed per day. All the subjects were also interviewed regarding history of hypertension. A general physical examination was also performed.
All anthropometric measurements were recorded using standardized procedures. Study subjects also underwent various clinical tests, such as blood tests for plasma glucose, glycosylated haemoglobin (HbA1c), and lipid levels. Blood samples were collected after ensuring 12 hours of overnight fasting. Total lipids, triglycerides (TG), and high-density lipoprotein-cholesterol (HDL-C) levels were estimated in serum, using kits (End Point Assay with Liquid Clearing Factor-LCF, Span Diagnostics Ltd. India). Low-density lipoprotein-cholesterol (LDL-C) was calculated using the Friedewald formula: LDL-C+TC-[HDL-C-(TG in mg/dL/5)] (18).
The current status of diabetes mellitus was measured using the criteria established by the American Diabetes Association (19), i.e. a medical record indicating either a fasting plasma glucose (FPG) level of >7.0 mmol/L or [greater than or equal to]126 mg/dL after a minimum 12-hour fasting, or 2-hour post-glucose level (oral glucose tolerance test) of >11.1 mmol/L or [greater than or equal to]200 mg/dL on more than one occasion, with symptoms of diabetes.
Blood pressure was recorded after the subjects had rested for at least ten minutes. The equipment was mercury sphygmomanometer (Diamond Deluxe BP apparatus, Pune, India). The machine was Regularly inspected and validated. An appropriately-sized cuff (cuff bladder encircling at least 80% of the arm) was used for ensuring accuracy. It was applied on the right arm. The stethoscope bell was placed lightly over the brachial artery, and the blood pressure was recorded to the nearest 2 mmHg, reading from the top of the mercury meniscus. Systolic blood pressure (SBP) was recorded at the first appearance of two or more Korotkoff sounds and the disappearance of Korotkoff sound (onset of phase 5) was used for defining the diastolic blood Pressure (DBP). Two readings were taken ten minutes apart, and mean of the two was considered the actual blood pressure. Hypertension was diagnosed based on the drug treatment for hypertension or if the blood pressure was >130/80 mmHg according to the Joint National Committee-7 (JNC-VII) criteria for diabetics (20, 21). The study subjects were classified into two groups, based on the history of antihypertensive drugs. The study subjects in group one were defined as not taking drugs for hypertension, were without past history of hypertension with normal blood pressure at the time of study or were detected for the first time to have hypertension, and known cases of hypertension not taking antihypertensive drugs. In group two, the study subjects were defined as taking drugs for hypertension, were having either hypertension in control with drugs or uncontrolled blood pressure even with drugs.
Body mass index (BMI) values for Indians were defined according to the recommendations by Indian Council of Medical Research. A study subject was considered to be obese if BMI was >25 kg/[m.sup.2] and overweight when BMI was 23-24.9 kg/[m.sup.2] (22).
Glycosylated haemoglobin (HbA1c) was measured by the high-pressure liquid chromatography (HPLC) method, using the variant machine (BIORAD, Hercules, California, USA). Reference non-diabetic range is 4.0-6.0%. Control sera were included in each batch of samples analyzed. The criterion for glycaemic status was <7% (good control), 7-8% (suboptimal control), 8-9% (inadequate control), and >9% (uncontrolled) (23).
Data were analyzed using the SPSS software (version 11.5). Means, standard deviations, and percentages were used for descriptive analysis. Student's f-test was used for testing the significance of differences between the mean values of two continuous variables. Univariate logistic regression analysis was conducted by comparing the outcome variable (consuming diabetic diet) with each independent variable of interest (age, sex, visiting dietician, level of education, occupation, glycaemic status, duration, and family history of diabetes), using odds ratio (OR) and their 95% confidence intervals (CI). Likelihood ratio test was used in estimating odds ratio and 95% CI for all associations of interest. Multivariate logistic regression analysis was performed to adjust for simultaneous effects of multiple factors or to control the effects of confounding factors on the outcome variable. The logistic regression model was used because the dependent variable was dichotomous (24)--either a diabetic subject was consuming diabetic diet or not consuming diabetic diet. The criteria for inclusion of factors in the multivariate analysis were: all variables from the univariate analysis with a p value of [less than or equal to]0.1, along with all the variables of known biological importance. To assess the importance of each variable included in the model, Wald statistic for each variable was used. The parameters of the logistic regression model were estimated by the maximum likelihood method. The adjusted odds ratios (ORs) and their 95% confidence intervals (CIs) were computed using the estimates of parameters of final model. Selection of final model was based on parsimony, biological interpretability, and statistical significance. The probability (p) level of less than 0.05 was considered significant.
The Institutional Review Board of the All India Institute of Diabetes and Research reviewed and approved the study protocol and instrument.
A sample of 405 diabetic subjects was enrolled. Of the total study population, 399 (98.5%) had T2DM, and 6 (1.5%) had type 1 diabetes mellitus. Hence, analysis was performed on 399 T2DM subjects. Of 399 T2DM, 65% were male, and 96% were literate. The study subjects were evenly distributed in four quartiles of age with mean of 53.16[+ or -]7.95 years. Ninety-one percent (365/399) of the subjects were following the Hinduism religion (Table 1). The mean weight (kg) and height (cm) were (69.04[+ or -]10.50) and (164.51[+ or -]9.75) respectively. The mean duration of diabetes since diagnosis was 5.95[+ or -]4.42 years.
Risk and behaviour profile
The findings of the study showed that 140 (35%) had good glycaemic control (HbA1c <7%). The findings showed the subjects had a mean BMI of 25.57[+ or -]4.05. Only 21% of the subjects were of normal weight; the majority were either overweight (BMI 23-24.99 kg/[m.sup.2], 24%) or obese (BMI [greater than or equal to]25 kg/[m.sup.2], 52%). About half (198/399) of the subjects had positive history of hypertension, and three-fourths (300/399) had positive family history of diabetes. Only 37% of the subjects were performing self-testing for blood sugar. The study also revealed that 95 (24%) of the subjects were smokers, and 32 (8%) were consuming alcohol (Table 1).
There was a significant (p<0.05) difference between male and female subjects with respect to mean weight (male=71.101[+ or -] 9.809 kg, female=65.165[+ or -]10.498 kg), height (male=169.83 [+ or -]6.875 cm, female=154.66[+ or -]5.831 cm), and BMI (male= 24.64[+ or -]3.523, female=27.30[+ or -]4.418) (Table 2).
Majority (73%) of the subjects consuming diabetic diet were recommended by the family physicians/ dieticians. However, only 39% reported that they had visited dietician since their diagnosis of diabetes, and only 2% reported counting calorie intake. Doctors/family physicians were reported to be the good source of advice regarding diet by 77% study population. The main method of cooking was: boiling and roasting (36%). Majority (88%) reported taking low fat or skimmed milk (Table 3).
Results of univariate analysis showed that visit to a dietician (OR=9.7, 95% CI=4.898-19.465), secondary level of education (OR=2.6, 95% CI=1.611-4.128), and low intake of fat (OR=2.6, 95% CI=1.385-4.760) are significantly associated with consumption of diabetic diet among T2DM subjects. Family history of diabetes is marginally associated with consumption of diabetic diet among T2DM subjects (Table 4). However, in univariate analysis, not a single factor was significantly associated with glycaemic status.
The final multivariate logistic regression model revealed that compared to the subjects not consuming diabetic diet, those who consumed diabetic diet were more likely to visit dietician (adjusted OR=10.6, 95% CI=5.124-21.816), consume low fat (adjusted OR=2.2, 95% CI=1.078-4.291), had higher level of education (adjusted OR=3.5, 95% CI=2.020-5.948), and have positive family history of diabetes (adjusted OR=1.8, 95% CI=0.996-3.094)
Diabetes, literally a 'sweet' disease, is slowly but surely spreading around the world, and India today is home to one of the world's fastest-growing diabetic population (25). Hence, need for preventive actions through lifestyle modifications (diet control, physical exercise, etc.) would be widely given due importance (26).
The main factors observed in our study population were visit to dieticians, level of education, consumption of low fat/skimmed milk, and presence of family history of diabetes. Majority (88%) of the study subjects were consuming low fat/skimmed milk, which differ from a study by Al-Kaabi et al. (23). The reason for discrepancy may be that our study subjects were more likely to seek dietary advice from family physician/dietician. Diet planning is the mainstay in the self-management and control of T2DM (23). In the present study, 73% of the subjects were Consuming diabetic diet, which differs from our previous report (27). This suggests that our study population was seriously considering the dietary advice. The main sources of dietary advice were: family physicians (77%) and dieticians (4%) who had a minimal role in dietary advice; the finding is consistent with those of previous studies (15, 23). The possible explanation for this may be: easier access to family physicians than dieticians.
This study confirms our previous report regarding family history of diabetes among T2DM subjects (27). Result also showed that very few study subjects (14/399) were illiterate. This is expected because sample of this study was drawn from speciality hospital located in urban area.
Our findings for obesity (52%) among T2DM subjects are consistent with previous reports (28-31). Findings of this study also confirm the previous reports of low level of self-monitoring of blood sugar (32). This suggests that there might be a lack of awareness of its importance in relation to control of diabetes.
In this study, only 35% subjects had good glycaemic control, which is supported by reports from Holmstrom et al. (34%) and Al-Maskari et al. (38%) (33-34). However, this study could not Demonstrate any significant association between diabetic diet and glycaemic control, despite there is high percentage of study subjects consuming diabetic diet. This suggests that our study subjects might have started consuming diabetic diet recently, which has insignificant impact on glycaemic status in short duration.
The study has some weaknesses; only diet recall method was used for the last 3 days, and the study did not use any additional data on duration of diabetic diet consumption, which may either reduce or exaggerate the result of glycaemic control. This might be the reason behind insignificant association between diabetic diet and glycaemic control. Total reliance on the subjects regarding diabetic diet was another limitation. This is a hospital-based study from urban setup, which may not be representative of and applicable to general population. However, this could provide a reasonably precise and reliable estimate of factors associated with consumption of diabetic diet among T2DM subjects from western India. Such weaknesses may become a guide for future studies.
This study revealed that majority (73%) of the subjects were consuming diabetic diet. The study also showed that visit to dieticians, level of education, consumption of low fat/skimmed milk, and presence of family history of diabetes were the main factors associated with consumption of diabetic diet. Self-monitoring of blood sugar is done by few subjects (37%).
Based on our findings we recommend the following:
* Visit to a dietician must be emphasized
* Frequent self-monitoring of blood sugar level needs to be taught and encouraged because it is associated with good glycaemic control.
Despite limitations, this study underlines the need for further investigation in India through longitudinal and cohort study designs to establish the association between consumption of diabetic diet and glycaemic control
The study was supported by All India Institute of Diabetes and Research, Ahmedabad, India. The authors would like to express their sincere thanks to all the diabetic subjects who participated in the study. They would also like to thank Dr. W.Q. Shaikh for reviewing the manuscript.
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Mayur Patel (1), Ina M. Patel (1), Yash M. Patel (1), Suresh K. Rathi (2)
(1) Swasthya Hospital, All India Institute of Diabetes and Research, Narainpura, Ahmedabad 380013, Gujarat, India; (2) Department of Community Medicine, SBKS Medical Institute and Research Centre, Sumandeep Vidyapeeth, Piparia, Vadodara 391 760, Gujarat, India
Correspondence and reprint requests:
(Soft copy will be available from the authors
Dr. Suresh Kumar Rathi
F-102, Aalekh Complex
8 Amravati Society, Near Yash Complex
Gotri Road, Vadodara
Table 1. Sociodemographic characteristics and profile of clinical and other associated factors of type 2 diabetic subjects from Ahmedabad, Western India (n=399) Characteristics Number Percent- (n=399) age * Age (years) Up to 47 109 27 >47-52 98 25 >52-58 102 25 >58 90 23 Sex Male 259 65 Female 140 35 Marital status Never married 14 4 Ever married 385 96 Religion Hinduism 365 91 Islam 15 4 Christianity and others 19 5 Level of education No education 14 4 Primary school 84 21 Secondary school 176 44 College level 107 26 University level 14 4 Professional degree (CA, MBA, MBBS, etc.) 4 1 Occupation Govt. service 8 2 Professional 12 3 Private service 87 22 Business 116 29 Household work/retired 176 44 Type of diabetes T2DM 399 100 Mode of diagnosis of diabetes Symptomatic 373 93 At screening 23 6 Incidental 3 1 Duration of diabetes (years) 1-2 105 26 >2-5 120 30 >5-9 90 23 >9 84 21 Glycaemic status (%) <7 (good control) 140 35 7-8 (suboptimal control) 120 30 >8-9 (inadequate control) 80 20 >9 (uncontrolled) 59 15 Family history of diabetes Positive 300 75 Negative 99 25 Body mass index (BMI) group Underweight (<18.5 kg/[msup.2]) 13 3 Normal (18.5-22.9 kg/[m.sup.2]) 83 21 Overweight (23.0-24.9 kg/[m.sup.2]) 95 24 Obese ([greater than or equal to] 208 52 25.0 kg/[m.sup.2]) Self-monitoring blood sugar Yes 146 37 No 253 63 Hypertension Present 198 50 Not present 201 50 Smoker Yes 95 24 No 304 76 Alcohol consumption Yes 32 8 No 367 92 * All percentages rounded to whole numbers Table 2. Characteristics of the study population, clinical and laboratory findings sex among type 2 diabetic subjects from Ahmedabad, Western India (n=399) Characteristics Mean[+ or -]SD Male Age (years) 52.95[+ or -]8.136 Weight (kg) 71.101[+ or -]9.809 Height (cm) 169.83[+ or -]6.875 Body mass index (kg/[m.sup.2]) 24.64[+ or -]3.523 Duration of diabetes (years) 6.027[+ or -]4.353 Blood pressure without drugs (n=201) Systolic (mmHg) 130.45[+ or -]14.076 Diastolic (mmHg) 83.15[+ or -]7.261 Blood pressure with drugs (n=198) Systolic (mmHg) 135.34[+ or -]16.845 Diastolic (mmHg) 83.14[+ or -]9.469 Lipid profile (n=389) LDL cholesterol (mg/dL) 111.19[+ or -]36.297 HDL cholesterol (mg/dL) 41.42[+ or -]5.000 Triglycerides (mg/dL) 187.93[+ or -]118.826 Total lipids (mg/dL) 714.46[+ or -]167.240 Characteristics Mean[+ or -]SD Female Age (years) 53.55[+ or -]7.602 Weight (kg) 65.165[+ or -]10.498 Height (cm) 154.66[+ or -]5.831 Body mass index (kg/[m.sup.2]) 27.30[+ or -]4.418 Duration of diabetes (years) 5.828[+ or -]4.558 Blood pressure without drugs (n=201) Systolic (mmHg) 132.39[+ or -]14.639 Diastolic (mmHg) 83.17[+ or -]8.166 Blood pressure with drugs (n=198) Systolic (mmHg) 134.93[+ or -]15.936 Diastolic (mmHg) 84.10[+ or -]8.207 Lipid profile (n=389) LDL cholesterol (mg/dL) 116.34[+ or -]33.184 HDL cholesterol (mg/dL) 42.74[+ or -]6.029 Triglycerides (mg/dL) 181.67[+ or -]119.690 Total lipids (mg/dL) 711.99[+ or -]143.014 Characteristics p value Age (years) 0.475 Weight (kg) <0.001 Height (cm) <0.001 Body mass index (kg/[m.sup.2]) <0.001 Duration of diabetes (years) 0.669 Blood pressure without drugs (n=201) Systolic (mmHg) 0.350 Diastolic (mmHg) 0.986 Blood pressure with drugs (n=198) Systolic (mmHg) 0.861 Diastolic (mmHg) 0.598 Lipid profile (n=389) LDL cholesterol (mg/dL) 0.172 HDL cholesterol (mg/dL) 0.220 Triglycerides (mg/dL) 0.623 Total lipids (mg/dL) 0.884 Table 3. Dietary practices among type 2 diabetic subjects from Ahmedabad, Western India (n=399) Characteristics Number Percent- (n=399) age * Consuming diabetic diet Yes 290 73 No 109 27 Consuming low fat/ skimmed milk Yes 351 88 No 48 12 Visited dietician since diagnosis of diabetes Yes 154 39 No 245 61 Counting daily calorie intake Yes 7 2 No 392 98 Methods of cooking Boiling and frying 119 30 Boiling and roasting 143 36 Roasting and frying 66 16 Boiling, frying, and roasting 71 18 Best source of advice regarding diet Self 51 13 Family member 18 4 Friend/colleague 4 1 Doctor/family physician 306 77 Dietician 15 4 Self, family member, and doctor 5 1 Management of diabetes through drugs with diet or physical activity Yes 342 86 No 57 14 Using drugs to control diabetes Yes 173 43 No 226 57 Following physical activities, recommendations by family physician Yes 215 54 No 184 46 * All percentages rounded to whole numbers Table 4. Univariate logistic analysis of the factors among hospital-based T2DM subjects from Ahmedabad, Western India (n=399) Consuming diabetic diet Variable Yes No OR (n=290) (n=109) Age (years) Up to 47 79 30 1.07 >47-52 74 24 1.25 >52-58 73 29 1.02 >58 64 26 1 Sex Male 189 70 1.04 Female 101 39 1 Visit to dieticians Yes 144 10 9.7 No 146 99 1 Level of education No education 6 8 0.48 Up to secondary 208 52 2.58 Above secondary 76 49 1 Occupation Housewifery/retired 133 43 1.32 Business 82 34 1.03 Service 75 32 1 Duration of diabetes (years) 1-2 69 36 0.81 >2-5 97 23 1.78 >5-9 65 25 1.10 >9 59 25 1 Family history of diabetes Positive 224 76 1.47 Negative 66 33 1 Consuming low fat/skimmed milk Yes 264 87 2.56 No 26 22 1 Glycaemic status (%) <7 99 41 1 [greater than or equal to]7 191 68 1.16 Variable (95% CI) p value Age (years) Up to 47 (0.575-1.989) 0.831 >47-52 (0.655-2.394) 0.496 >52-58 (0.546-1.914) 0.944 >58 - Sex Male (0.658-1.652) 0.859 Female - Visit to dieticians Yes (4.898-19.465) <0.001 No - Level of education No education (0.158-1.479) 0.203 Up to secondary (1.611-4.128) <0.001 Above secondary - Occupation Housewifery/retired (0.771-2.260) 0.312 Business (0.579-1.829) 0.922 Service - Duration of diabetes (years) 1-2 (0.438-1.506) 0.509 >2-5 (0.931-3.431) 0.081 >5-9 (0.571- 2.125) 0.773 >9 - Family history of diabetes Positive (0.901-2.411) 0.123 Negative - Consuming low fat/skimmed milk Yes (1.385-4.760) 0.003 No - Glycaemic status (%) <7 - [greater than or equal to]7 (0.736-1.838) 0.517 OR=Odds ratio; CI=Confidence interval Table 5. Multivariate logistic regression analysis of factors of consuming diabetic diet among hospital-based T2DM subjects from Ahmedabad, Western India (n=399) Variable AOR 95% CI p value Visit to dieticians Yes 10.6 5.124-21.816 <0.001 No 1 - Level of education No education 0.7 0.215-2.453 0.606 Up to secondary 3.5 2.020-5.948 <0.001 Above secondary 1 - Family history of diabetes Positive 1.8 0.996-3.094 0.051 Negative 1 - Consuming low fat/skimmed milk Yes 2.2 1.078-4.291 0.030 No 1 - AOR=Adjusted odds ratio; CI=Confidence interval
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