20121018 - BNI of kinds of potato chips (descriptive statistics) - 2012

[Data] [<Normal page] [PEREZGONZALEZ Jose D (2012). BNI of kinds of potato chips (descriptive statistics). Journal of Knowledge Advancement & Integration (ISSN 1177-4576), 2012, pages 287-291.]

BNI of generic brands (description)

Some potato chips5 are sold under a generic brand (eg, a supermarket brand) while others are sold under proprietary brands, with the latter having a somewhat better standing in regards to perceived quality. Thus, it is of interest to test whether such characteristic informs about overall nutritional balance (BNI) and, thus, whether it may help choose more balanced products. As part of his research on the nutritional balance of potato chips, Perezgonzalez (2012)3 also assessed whether generic and proprietary brands differed in regards to overall nutritional balance. This article provides descriptive information both about the sample of products under research (foodBNI) as well as about a hypothetical diet based on those products (dietBNI).

foodBNI

Proprietary brands were more abundant than generic brands, overall. Even so, the distribution of nutritional balance in the two groups was quite similar: they appeared as highly unbalanced6, clustering around BNI 80 and with their medians located at around BNI 827. They also showed a perceptible skewness towards higher levels of unbalance, with means located around BNI 86. Indeed, the 68% of generic products in the middle of the distribution had a nutritional balance somewhere between BNI 79.58 (P16) and BNI 98.29 (P84), while the middle 68% of named products had a nutritional balance somewhere between BNI 79.41 (P16) and BNI 98.62 (P84). In both cases the means were off-centered towards the 84th percentile.

Illustration 1: Kind of potato chips
Generic brand
Unbalance No Yes
=0
>0
≥10
≥20
≥30
≥40
≥50
≥60 1
≥70 9 3
≥80 23 9
≥90 9 1
≥100 5 1
≥110 1 1
≥120
≥130
≥140
≥150
≥160
≥170
≥180
≥190
≥200
Median 82.95 82.38
SPR 9.61 9.36
P16 79.41 79.58
P84 98.62 98.29
RSkew 6.07 6.56
Mean 86.70 85.86
StDev 10.74 9.84
zSkew 2.39 3.57
zKurt 0.47 2.88

dietBNI

As part of two hypothetical diets where the corresponding generic and named products contributed the same weight of chips, the resulting nutritional composition of such diets would still be highly unbalanced, of around BNI 70 for both diets.

Potato chips Protein Carbs Sugar Fat Sat.fat Fiber Sodium BNI
Named brand (unest.) 6.1 50.7 1.8 32.4 11.1 0.0 654.8 85.15
Named brand (est.) 6.1 50.7 1.8 32.4 11.1 4.4* 654.8 70.49
Generic brand (unest.) 5.2 50.3 1.3 33.1 14.3 0.0 589.3 84.06
Generic brand (est.) 5.2 50.3 1.3 33.1 14.3 4.4* 589.3 69.40
(*) Fiber content estimated from USDA database4.

Methods

Research approach

Exploratory study for mapping the nutritional balance of potato chip products5 sold under generic and proprietary brands in New Zealand.

Sample

Stratified sample of 63 potato chip products (Perezgonzalez, 2012a2), including diverse flavors and other relevant categories. Of these products, 15 were from generic brands and 48 were from proprietary brands. The products were collected in a convenient manner from three major national supermarket chains. The final sample covered a large proportion of the population of potato chip products available in such supermarkets.

Illustration 2: Potato chips sold under generic brands
Product 100g BNI Generic
Bluebird Light Plus sour cream & chives 65.36 No
Copper Kettle Chips vintage cheddar & red onion 71.86 No
Copper Kettle Chips wood fired BBQ 71.91 No
Copper Kettle Chips sea salt 73.04 No
Heartland Potato Chips sour cream & chives 77.31 No
Eta Kettles honey soy chicken 77.99 No
Eta Kettles ready salted 79.09 No
Pams Kettle Fried Chips ready salted 79.09 Yes
Pams Classic chicken 79.24 Yes
Eta UpperCuts Spuds Ripple Cut chicken 79.48 No
Heartland Potato Chips chicken 79.58 No
Eta Kettles BBQ 79.75 No
Pams Classic salt & vinegar 79.84 Yes
Eta UpperCuts Spuds Ripple Cut sour cream & chives 80.00 No
Heartland Potato Chips shouthern salt 80.05 No
Eta UpperCuts Spuds Thick Cut sour cream & onion 80.07 No
Eta Kettles Krinkle Cut black pepper & salt 80.16 No
Bluebird Thick Cut crispy bacon 80.51 No
Eta UpperCuts Delicut sea salt & balsamic vinegar 81.04 No
Pams Classic sour cream & chives 81.21 Yes
Signature Range Crinkle Cut sour cream & chives 81.21 Yes
Signature Range Crinkle Cut chicken 81.39 Yes
Pams Classic cheese & onion 81.53 Yes
Eta UpperCuts Delicut chargrilled chicken & herb 81.59 No
Bluebird Thin Cut stuffed baked potato 81.70 No
Bluebird Original ready salted 82.09 No
Eta UpperCuts Spuds Thin Cut ready salted 82.17 No
Eta UpperCuts Spuds Ripple Cut ready salted 82.38 No
Solay Potato Crisps sea salt 82.38 No
Pams Classic ready salted 82.38 Yes
Signature Range Crinkle Cut ready salted 82.38 Yes
Eta UpperCuts Spuds Ripple Cut spring onion 82.65 No
Pams Classic green onion 82.65 Yes
Signature Range Crinkle Cut green onion 82.65 Yes
Eta UpperCuts Spuds Thin Cut chicken 82.68 No
Freedom Foods potato chips no added salt 83.23 No
Eta UpperCuts Delicut sweet chilli relish 83.73 No
Eta UpperCuts Spuds Ripple Cut the works 83.80 No
Eta UpperCuts Spuds Thick Cut ready salted 83.96 No
Eta Kettles Krinkle Cut rack of ribs 84.27 No
Solay Potato Crisps sour cream & chives 84.41 No
Eta UpperCuts Delicut sea salt 84.49 No
Pams Classic BBQ 85.26 Yes
Eta Kettles roast lamb & mint 85.47 No
Eta Kettles spare ribs 87.12 No
Countdown Crinkle Cut Jumbo Bag ready salted 90.99 Yes
Heartland Potato Chips green onion 92.46 No
Bluebird Original salt & vinegar 92.61 No
Copper Kettle Chips sea salt & vinegar 92.73 No
Bluebird Local Harvest chicken 94.29 No
Bluebird Thick Cut sour cream & chives 96.03 No
Bluebird Local Harvest salt & vinegar 98.26 No
Bluebird Thin Cut chicken 98.35 No
Heartland Potato Chips salt & vinegar 98.60 No
Bluebird Original chicken 98.77 No
Bluebird Original green onion 100.15 No
Eta Kettles Krinkle Cut extreme salt & vinegar 105.29 No
Eta UpperCuts Spuds Thin Cut salt & vinegar 105.88 No
Eta Kettles salt & vinegar 107.57 No
Pams Kettle Fried Chips salt & vinegar 107.57 Yes
Solay Potato Crisps salt & vinegar 109.54 No
Signature Range Crinkle Cut salt & vinegar 110.47 Yes
Eta UpperCuts Spuds Ripple Cut salt & vinegar 115.85 No

Variables

Variables of interest for this research were the following:

  • Weight contribution of seven nutrients (protein, carbohydrate, sugar, fat, saturated fat, fiber and sodium) to 100g of a food product.
  • The Balanced Nutrition Index (BNI) of each food product, as calculated from above variables.
  • Aggregated information for the sample of products (foodBNI).
  • Aggregated information about the individual nutrients for the simulation of a potato-chip-based diet (dietBNI).

Materials & analysis

Relevant data were collated after purchasing the food products or by capturing such information from the producers' websites if this information was available and was deemed reliable. The data were then assessed using the Balanced Nutrition Index™ (BNI™) technology (see Perezgonzalez, 20111). Missing data for fiber was estimated from USDA's database (20114).

SPSS-v18 was used for the computation of the BNI, and for descriptive statistical analyses.

References
1. PEREZGONZALEZ Jose D (2011). Balanced Nutrition Index™ (BNI™). Journal of Knowledge Advancement & Integration (ISSN 1177-4576), 2011, pages 20-21.
2. PEREZGONZALEZ Jose D (2012a). Tasty taytos. The Balanced Nutrition Index (ISSN 1177-8849), 2012, issue 5.
3. PEREZGONZALEZ Jose D (2012b). Nutritional balance of potato chips (descriptive statistics). Journal of Knowledge Advancement & Integration (ISSN 1177-4576), 2012, pages 244-246.
4. USDA (2011). Nutrient data for 19411, Snacks, potato chips, plain, salted. USDA National Nutrient Database for Standard Reference, 2011, December 7.
+++ Notes +++
5. Thin slices of potatoes fried or baked until crisp, and with added seasoning and flavorings. They may also be known as potato crisps or potato wafers.
6. When interpreting the BNI as 0 = balanced, 1-29 = slightly unbalanced, 30-59 = moderately unbalanced, 60-99 = highly unbalanced, ≥100 = extremely unbalanced.
7. These results may be slightly overestimated, as no potato chip product provided nutrition information for fiber content. Although uncertain, the overestimation may be around 15 units on the BNI scale.

Want to know more?

BNI analysis of individual products
You can access either the BNI™ database or the 'BNI™ journal (2012, issue 5) - Tasty taytos' for individual nutrition analyses of each food product in the sample.
Wiki of Science - BNI of kinds of potato chips (further knowledge)
Two Wiki of Science pages provide further introductory and inferential information about the nutritional balance of kinds of potato chips.
Wiki of Science - Nutritional balance of potato chips
This Wiki of Science page provides an introduction to the BNI of potato chips, irrespective of brand.

Author

Jose D PEREZGONZALEZ (2012). Massey University, Turitea Campus, Private Bag 11-222, Palmerston North 4442, New Zealand. (JDPerezgonzalezJDPerezgonzalez).


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